Note: Descriptions are shown in the official language in which they were submitted.
1340'04
Pvrrolopyrimidine Derivatives, Their Production and Use
This invention relates to the novel pyrrolopyrimidine
derivatives which are useful as anti-tumor agents, the
production and utilization thereof.
Folic acid is a carrier of a C1 unit in a living
body, derived from formic acid or formaldehyde, acting as
a coenzyme in various enzymatic reactions such as those in
biosynthesis of nucleic acid, in metabolism of amino acids
and peptides and in generation of methane. Particularly
in biosynthesis of nucleic acid, folic acid is essential
for formylation in the two pathways, i.e. the purine
synthetic pathway and the thymidine synthetic pathway.
Usually folic acid is required to be transformed into its
activated coenzyme form by reduction in two steps before
it becomes biologically active. Amethopterin
(methotrexate: MTX) and the related compounds are known to
inhibit the reduction from dihydrofolic acid into
tetrahydrofolic acid by coupling strongly with the
dominant enzyme in the second step (dihydrofolic acid
reductase). These drugs have been developed as antitumor
drugs because they may disturb the DNA synthesis and
consequently cause cell death, and are currently regarded
of major clinical important. On the other hand, a novel
tetrahydroaminopterin antitumor agent (5,10-dideaza-
5,6,7,8-tetrahydroaminopterin: DDATHF) has been reported
which, unlike the drugs described above, does not inhibit
dihydrofolic acid reductase and of main mechanism of which
consists in inhibition of glycinamide ribonucleotide
transformylase required in the initial stage of purine
biosynthesis [Journal of Medicinal Chemistry, 28, 914
(1985)].
Various studies are now being conducted on therapy
for cancer, and what is expected strongly is the
~~~o?~~
- 2 -
development of drugs which are more effective and have
toxicities highly specific to cancer cells based on some
new mechanism. The antitumor agent MTX, the action mechanism
of which consists in antagonism against folic acid, is
clinically used widely, though the therapeutic effect is
still unsatisfactory because it has relatively strong
toxicity with little effect on solid cancer.
As the result of the inventors' researches under the
circumstances described above, they have found out that
novel pyrrolopyrimidine derivatives have toxicities highly
specific to tumor cells and excellent antitumor effects,
and completed this invention.
This invention relates to
(1) A compound of the formula (I)
R
I
N~ Ctl n / \ CONHCHCOOR '
OO~ ~ I <I)
HZN ~y ~ y CHZCHZCOOR2
H
(wherein the ring ~ is a pyrrole or pyrroline ring, X is an
amino group or a hydroxyl group, Y is a hydrogen atom, an
amino group or a hydroxyl group, R is a hydrogen atom, a
fluorine atom, an alkyl group, an alkenyl group or an
alkynyl group, -COOR1 and -COORa are independently
carboxyl groups which may be esterified and n is an
integer of 2 to 4, and R may be different in each of the n
repeating units), and salts thereof,
(2) A method for production of the compounds (I) or salts
thereof, characterized in that a compound of the formula
(zI)
~34~'~~~
- 3 -
X
R
N~ -f CH ~ / \ C0011 ( Q )
H~N N N
H
(wherein the ring AOis a pyrrole or pyrroline ring, X is an
amino group or a hydroxyl group, Y is a hydrogen atom, an
amino group or a hydroxyl group, R is a hydrogen atom, a
fluorine atom, an alkyl group, an alkenyl group or an
alkynyl group, and n is an integer of 2 to 4, and R may be
different in each of the n repeating uni ~, a reactive
derivative thereof at the carboxyl group or a salt thereof,
and a compound of the formula (III)
HaNCHC00R1
(III)
CHaCHaCOORa
(wherein -COORi and -COOR2 are independently carboxyl groups
which may be esterified) or a salt thereof, are reacted.
(3) A compound of the formula (IV)
25
X R
fCfl ~ / \ COOK' fIV)
I(7f1 N Pi
fl
(wherein the ring AOis a pyrrole or pyrroline ring, X is an
amino group or a hydroxyl group, Y is a hydrogen atom, an
amino group or a hydroxyl group, R is a hydrogen atom, a
fluorine atom, an alkyl group, an alkenyl group or an
alkynyl group, -COORS is a carboxyl group which may be
esterified and n is an integer of 2 to 4, and R may be
different in each of the n repeating units), and salts
thereof .
(4) .Anti-tumor agents containing the compounds (I) or
salts thereof.
..
- 4 -
When X or Y in the formulas described above is a
hydroxyl group, each of the compounds (I), (II) and (IV) may
exist as an equilibrium mixture of the respective tautomers.
The following partial structure formulas show the sites of the
structure which are subject to tautomerism, and the equilibrium
between the tautomers is illustrated in the following.
OH O
N' ~ _
H N' 'N H2N N
2
O
N OH N
H H
For the convenience of description, only the hydroxyl forms
and the corresponding names are described throughout this
specification, but the corresponding oxo forms are always
included.
There may be two or more asymmetric centers in the
compounds (I) of this invention, and the absolute configuration
at all of the asymmetric carbon atoms may be the S, R or S-R
mixed form, except that the absolute configuration at the
asymmetric carbon atom in the side chain derived from glutamic
acid is always S(L). Therefore the compounds (I) may have two
or more diastereomers which, if necessary, can easily be
separated from each other by a routine method for separation and
purification. All of the diastereomers which can be separated
by such a method are included in this invention.
~J~~~~~
- 4a -
Alkyl groups represented by R in the formulas described
above include alkyl groups having 1 to 3 carbon atoms) each
(e. g. methyl, ethyl, propyl, isopropyl
~.340'~04
_ 5 -
groups). Alkenyl groups represented by R in the formulas described
above include alkenyl groups having 2 to 3 carbon atoms) each
(e. g. vinyl, 1-methylvinyl, 1-propenyl, allyl, allenyl groups).
Alkynyl groups represented by R in the formulas described above
include alkynyl groups having 2 to 3 carbon atoms) each (e. g.
ethynyl, 1-propynyl, ~r~~~r Jgroups). Carboxyl groups which may
be esterified, represented by -COORl, -COOR2 and -COORS include
carboxyl groups which may be esterified by alkyl groups having 1
to 5 carbon atoms) each, benzyl groups which may be substituted
or phenyl groups which may be substituted preferably with nitro or
C1-3 alkoxy. The alkyl groups include methyl, ethyl, propyl, iso-
propyl, n-butyl, iso-butyl, sec-butyl, tert-butyl, n-pentyl, iso-
pentyl, sec-pentyl, neo-pentyl and tert-pentyl. The benzyl groups
which may be substituted include benzyl, nitrobenzyl, methoxy-
benzyl groups and so on. The phenyl groups which may be substitu-
ted include phenyl, nitrophenyl, methoxyphenyl groups and so on.
R
I
Preferred among the groups of the formula fCH~n are
R' R.
i
-CH2CH2-, -CH2CH2CH2-, -CH2CH2CH2CH2-, -CH2CH2CH-, and -CH2CHCH2 ,
(wherein R' is methyl, ethyl, vinyl, allyl, propen-1-yl, ethynyl,
propargyl or propyn-1-yl). Particularly preferred are -CH2CH2-,
CH3
-CH2CH2CH2- and -CH2CH2CH-.
In the following the method for production of the
compounds (I) of this invention is explained.
The compounds (I) or salts thereof can be obtained
1340'~~~
- 5a -
by acylation of glutamic acid derivatives shown by the formula
(III) or salts thereof with carboxylic acids shown by the formula
(II) or reactive derivatives thereof. The acylation may be per-
formed, for example, by acylation of the compound (III) with
the compound (II) in the presence of carbodiimide, diphenylphos-
phoryl azide or diethyl phosphoro cyanidate. Generally about 1
to 20 mole equivalent, preferably 1 to 5 mole equivalent of the
compound (III) relative to the compound (II) is used. Generally
about 1 to 25 mole equivalent, preferably about 1 to 5 mole
equivalent of a carbodiimide relative to the compound (III) is
used. As the carbodiimide, dicyclohexylcarbodiimide is preferable
for practical use, but other carbodiimides such as
13407~~
diphenylcarbodiimide, di-o-tolylcarbodiimide,
di-p-tolylcarbodiimide, di-tert-butylcarbodiimide,
1-cyclohexyl-3-(2-morpholinoehtyl)carbodiimide,
1-cyclohexyl-3-(4-diethylaminocyclohexyl)carbodiimide,
1-ethyl-3-(2-diethylaminopropyl)carbodiimide and
1-ethyl-3-(3-diethylaminopropyl)carbodiimide may be used.
The acylation is preferably performed in the presence of a
suitable solvent, and such solvents include water,
alcohols (e. g. methanol, ethanol, etc.), ethers (e. g.
dimethyl ether, diethyl ether, tetrahydrofuran, dioxane,
monoglyme, diglyme, etc.), nitriles (e. g. acetonitrile,
etc.), esters (e. g, ethyl acetate, etc.), halogenated
hydrocarbons (e. g. dichloromethane, chloroform, carbon
tetrachloride, etc.), aromatic hydrocarbons (e. g. benzene,
toluene, xylene, etc.), acetone, nitromethane, pyridine,
dimethylsulfoxide, dimethylformamide, hexamethyl-
phospholamide, sulfolane, and the suitable mixtures of two
or more of these solvents. The reaction is allowed to
proceed generally at a pH ranging from 2 to 14, preferably
at a pH ranging from about 6 to 9, at a temperature
ranging from about -10°C to the boiling point of the
solvent used (up to about 100°C), preferably at a
temperature ranging from about 0 to 50°C, for about 1 to
100 hours. The pH of the reaction mixture is adjusted, if
necessary, by addition of an acid (e. g. hydrochloric acid,
sulfuric acid, phosphoric acid, nitric acid, acetic acid,
etc.), a base (e. g. sodium alcoholate such as sodium
methylate and sodium ethylate, hydroxides of alkali metals
or of alkali earth metals such as sodium hydroxide,
potassium hydroxide, lithium hydroxide, barium hydroxide,
carbonates or bicarbonates of alkali metals or of alkali
earth metals such as sodium carbonate, potassium
carbonate, barium carbonate, calcium carbonate and sodium
biccarbonate, amines such as trimethylamine,
triethylamine, triethanolamine and pyridine), or a buffer
~.340~9~
~e.g. phosphate buffer, borate buffer, acetate buffer,
etc.). The reaction can proceed more advantageously in
the presence of a catalyst which promotes acylation. Such
catylysts include base catalysts and acid catalysts. The
base catalysts include tertiary amines (e. g. aliphatic
tertiary amines such as triethylamine; aromatic tertiary
amines such as pyridine, a-, ~- or 7-picoline,
2,6-lutidine, 4-dimethylaminopyridine,
4-(1-pyrrolidinyl)pyridine, dimethylaniline and
diethylaniline), and such acid catalysts include Lewis
acids [e. g. anhydrous zinc chloride, anhydrous aluminum
chloride (AlCls), anhydrous ferric chloride, titanium
tetrachloride (TiCl4), tin tetrachloride (SnCl4), antimony
pentachloride, cobalt chloride, cupric chloride, boron
trifluoride ethyl ether complex, etc.]. Among~the
catalysts described above, 4-dimethylaminopyridine or
4-(1-pyrrolidinyl)pyridine is preferable in many cases.
The suitable amount of the catalyst is such that is enough
to promote the acylation, being generally about 0.01 to l0
mole equivalent, preferably about 0.1 to 1 mole equivalent
relative to the compound (II). The reactive derivatives
of carboxylic acids (II) at the
carboxyl group, used for the acylation include acid
halides (e. g. fluoride, chloride, bromide, iodide), acid
anhydrides (e. g. iodoacetic acid anhydride, isobutyric
acid anhydride), mixed acid anhydrides with
monoalkylcarbonic acid esters (e. g. mono-methylcarbonic
acid ester, monoethylcarbonic acid ester,
monopropylcarbonic ester, mono-iso-propylcarbonic acid
ester, monobutylcarbonic acid ester,
mono-iso-butylcarbonic acid ester, mono-sec-butylcarbonic
acid ester, mono-tert-butylcarbonic acid ester), active
esters (e. g. cyanomethyl ester, carboethoxymethyl ester,
methoxymethyl ester, phenyl ester, o-nitrophenyl ester,
p-nitrophenyl ester, p-carbomethoxyphenyl ester,
1340~~4
_8_
p-cyanophenyl ester, thiophenyl ester), acid azides, mixed
acid anhydrides with phosphoric acid diesters (e. g.
dimethyl phosphate, diethyl phosphate, dibenzylphosphate,
diphenylphosphate), and mixed acid anhydrides with
phosphorous acid diesters (e. g. dimethyl phosphate,
diethyl phosphate, dibenzyl phosphate, diphenyl
phosphate), of the carboxylic acid (II). For acylation
with such a reactive derivative, the solvent, the catalyst
and the reaction temperature are the same as for acylation
in the presence of the carbodiimide described above.
For production of the compound (I-1) in which -COOR'
and -COOR2 in the formula of the compound (I) are carboxyl
groups, it is desirable that the compound in which -COOR1
and -COORa in the formula of the compound (III) are
esterified carboxyl groups is allowed to react with the
compound (II) followed by deesterification by per se known
degradation or catalytic reduction. Such degradation can
be performed by hydrolysis under basic conditions (method
A), hydrolysis under acidic conditions (method B-1) or
hydrolysis under acidic nonaqueous conditions (method
B-2). Bases used in the method A include metal alkoxides
such as sodium methoxide, sodium ethoxide, sodium butoxide
and potassium butoxide, metal hydroxides such as sodium
hydroxide, potassium hydroxide, lithium hydroxide and
barium hydroxide, and amines such as ammonia,
triethylamine and pyridine. Acids used in the method B-1
include mineral acids such as hydrochloric acid,
hydrobromic acid, sulfuric acid, nitric acid and
phosphoric acid, and organic acids such as trifluoroacetic
acid, trichloroacetic acid, methanesulfonic acid,
b~nzenesulfonic acid, p-toluenesulfonic acid and
camphorsulfonic acid. Catalysts used in the method B-2
include mineral acids such as hydrogen chloride, hydrogen
bromide, perchloric acid, sulfuric acid, nitric acid and
phosphoric acid, organic acids such as trifluoroacetic
~~~o~~~~
_ g _
acid, trichloroacetic acid, methanesulfonic acid,
benzenesulfonic acid, p-toluenesulfonic acid and
camphorsulfonic acid, and Lewis acids such as anhydrous
zinc chloride, anhydrous aluminum chloride (AlCls),
anhydrous ferric chloride, titanium tetrachloride (TiCl4),
tin tetrachloride (SnCl4), antimony pentachloride, cobalt
chloride, cupric chloride and boron trifuluoride ethyl
ether complex. Degradation is performed in a suitable
solvent at a temperature ranging from 0°C to the boiling
point of the solvent, preferably at 10 to X30°C, for 30
minutes to 2 days. The solvent used for the reaction by
the method A or by the method B-1 may be water, methanol,
ethanol, propanol, butanol, ethyleneglycol,
methoxyethanol, ethoxyethanol, tetrahydrofuran, dioxane,
monoglyme, diglyme, pyridine, dimethylformamide~~;
dimethylsulfoxide or sulfolane, or a suitable mixture of
two or more of these solvents; the solvent used for the
reaction by the method B-2 may be ethyl acetate, dimetyl
ether, diethyl ether, tetrahydrofuan, dioxane, monoglyme,
diglyme, dichloromethane, chloroform, carbon
tetrachloride, acetonitrile, benzene, toluene, xylene,
nitromethane or pyridine, or a suitable mixture of two or
more of these solvents. The catalytic reduction (method
C) is performed in a suitable solvent at a temperature
ranging from about -40°C to the boiling point of the
solvent used, preferably at about 0 to 50°C. The solvents
used include water, alcohols (e. g. methanol, ethanol,
propanol, iso-propanol, butylalcohol, sec-butylalcohol,
tert-butylalcohol, ethyleneglycol, methoxyethanol,
ethoxyethanol), acetic acid esters (e. g. methyl acetate,
ethyl acetate), ethers (e. g. dimethyl ether, diethyl
ether, tetrahydrofuran, dioxane, monoglyme, diglyme,
aromatic hydrocarbons (e. g. benzene, toluene, xylene),
pyridine, dimethylformamide and suitable mixtures of two
or more of these solvents. Catalysts for the catalytic
13407~~
- 10 -
reaction include palladium, platinum, rhodium and Raney
nickel. Addition of a trace amount of acetic acid,
trifluoroacetic acid, hydrochloric acid or sulfuric acid
can allow the reaction to proceed advantageously.
The method for production of the compound (I-1) is
selected according to the nature of -COOR1 and -COORa;
when -COOR1 and -COORa are carboxyl groups esterified with
methyl, ethyl, propyl, butyl, sec-butyl, phenyl or
substituted phenyl group, the method A or the method B-1
is applied advantageously; when -COOR1 and -COORa are
carboxyl groups esterified with iso-propyl or tert-butyl
group, the method B-2 is applied advantageously; and when
-COOR1 and -COORa are carboxyl groups esterified with
benzyl or a substituted benzyl group, the method B-1 or
the method C is applied advantageously. When -COOR1 and
-COOR2 are different from each other, the methods A, B-1,
B-2 and C may be combined appropriately.
In the following the method for production of the
starting compound (II) is explained.
The compound (II) wherein the ring OA is a pyrrole
ring, can be produced, for example, by the following
processes.
30
13~0'~9
Ra 0
I 1 Rb II
R'~~Cii )~ , -I- Rc - C ~-COOR'
Compound (V) Compound (VI).
Ra Rc
Process 1 R'~~II Process 2
~m \ COOK'
Rb
C~mnound (VII)
Ra Rc
I
Lrocess 3'
R'~~~ CII ~~~COOR' ~ ---
f3 RT ~b
Compound (VIII)
Ra Rc
' Process 4
R Cil )m~~~~~~~-COOR' ,
Rb
NC R' Compound (IX)
X Ra Rc
I Process 5
N/ ~ ~ CII ~m~~C00R' -
II~NyV~~Y R
II Compound (IV-1: Y=Nllz or Ofi)
X ~'' Rc
V, - C I I >iii ~~~~'~~- C 00 I I
II,N~N ~ IV ~ Y R
b
II Compound (II-1 : Y=N112 or O11)
Ra c
I
X Ra Rc J\ ~~ CII R \
Process ~, ~~-C0011
Compound ---~ N~ ~ ~ CII ~m~C0011 t N
(II-1: Y=ofl) II,N~ IRb ~ II,N~yi~ Rb
Y N II ,
il Compound Compound ( II-2 : Y=Il )
III-2: Y=(1)
Process E3
X I~ a IZ c
I I
Compound Process 7 N ~ ~ CII ~m~~COUR'
(IV-1: Y=O11)-~ Compound (IV-2: Y=Il) -' ( ~- I' ~
II t N'~~Vi~Y R
II Compound ( IV-2': ~'= H)
1340'~~~
_ i2 _
In the reaction formulas described above, X, Y and Rg
are the same as described before; Ra, Rb and Rc are
independently a hydrogen atom, a fluorine atom or an alkyl
group (the same as those represented by R described
before); R4 is a cyano group or an esterified carboxyl
group represented by the formula -COORb; A is a hydrogen
atom or a halogen atom (e. g. fluorine atom, chlorine atom,
bromine atom, iodine atom); B is a halogen atom (e. g.
chlorine atom, bromine atom, iodine atom) or an eliminable
group which may be easily derived from hydroxy group (e. g.
methanesulfonyloxy group, benzenesulfonyloxy group,
p-toluenesulfonyloxy group, trifluoromethanesulfonyloxy
group); and m is 0, 1 or 2. Rb in the esterified carboxyl
group represented by the formula -COORb is exemplified by
an alkyl group having 1 to 4 carbon atoms) (e. g. methyl,
ethyl, propyl, isopropyl, butyl, sec-butyl, tert-butyl,
etc.), phenyl or substituted phenyl group (p-nitrophenyl,
p-methoxyphenyl, etc.), and benzyl or substituted benzyl
(e. g. p-nitrobenzyl, p-methoxybenzyl, etc.).
The compound (V) may be dehydrogenated on the
possible position between the two adjacent carbons and
form an unsaturated bond.
In the following the reaction processes described
above are explained in detail.
Process 1
The compound (V) and the compound (VI) are subjected
to condensation and the resulting product is subjected to
reduction to give the compound (VII).
For the condensation, a known reaction (e. g. aldol
reaction, Reformatsky reaction, Wittig reaction, etc.) is
employable, and for the reduction, usually a catalytic
reduction under hydrogen atmosphere in the presence of a
catalyst (e.g. nickel, palladium, platinum, rhodium) is
advantageously employed.
1340r~~~
-13-
In the condensation by aldol reaction, the employable
base~catalysts include metal hyrdoxides such as sodium
hydroxide, potassium hydroxide, lithium hydroxide and
barium hydroxide, metal alkoxides such as sodium
methoxide, sodium ethoxide and potassium tent-butoxide,
metal amides such as sodium amide and lithium
diisopropylamide, metal hydrides such as sodium hydride
and potassium hydride, organic metal compounds such as
phenyllithium and butyllithium and amines such as
triethylamine, pyridine, a-, p- or 7-picoline,
2,6-lutidine, 4-dimethylaminopyridine,
4-(1-pyrrolidinyl)pyridine, dimethylaniline and
diethylaniline; the employable acid catalysts include
mineral acids such as hydrochloric acid, sulfuric acid,
nitric acid, phosphoric acid and boric acid, anc~ organic
acids such as oxalic acid, tartaric acid, acetic acid,
trifluoroacetic acid, methanesulfonic acid,
benzenesulfonic acid, p-toluenesulfonic acid and
camphorsulfonic acid. The condensation can be conducted
according to the known method [Ei-Ichi Negishi,
Organometallics i.n Organic Synthesis, vol. 1, John Wiley &
Sons, New York, Chichester, Brisbane, Toronto (1980)] which
comprises converting a ketone form into the silylenolether
form which is then subjected to condensation with an
aldehyde or an equivalent in the presence of a Lewis acid
(e. g. anhydrous zinc chloride, anhydrous aluminum chloride
(AlCls), anhydrous ferric chloride, titanium tetrachloride
(TiCl4), tin tetrachloride (SnCl4), antimony
pentachloride, cobalt chloride, cupric chloride, boron
trifluoride ethyl ether complex, etc.], or converting a
ketone form into the enolate by treating the ketone form
~,~~ with a metal triflate (e. g. dialkyl boron~tin (II)
triflate) in the presence of amines (e. g. triethylamine,
pyridine, «-, p- or 7-picoline, 2,6-lutidine,
4-dimethylaminopyridine, 4-(1-pyrrolidinyl)pyri~iine,
-14-
dimethylaniline, diethylaniline) followed by subjecting
the enolate to condensation with an aldehyde or an
equivalent. The condensation is conducted in a suitable
solvent at a temperature ranging from -100°C to the
boiling point of the solvent, preferably ranging from -78
to 100°C, for 1 minute to 3 days. Solvents employable for
the reaction include water, liquid ammonia, alcohols (e. g.
methanol, ethanol, propanol, isopropanol, butyl alcohol,
sec-butyl alcohol, tert-butyl alcohol, ethylene glycol,
methoxyethanol, ethoxyethanol), ethers (e. g. dimethyl
ether, diethyl ether, tetrahydrofuran, dioxane, monoglyme,
diglyme), halogenated hydrocarbons (e. g. dichloromethane,
chloroform, carbon tetrachloride), aliphatic hydrocarbons
(e. g. pentane, hexane, heptane), aromatic hydrocarbons
(e. g. benzene, toluene, xylene), dimethylformamide,
dimethylsulfoxide, hexamethylphospholamide, sulfolane, and
the suitable mixtures thereof. In the condensation by
Wittig,reaction, the employable reagents include metal
hydroxides such as sodium hydroxide, potassium hydroxide,
lithium hydroxide and barium hydroxide, metal alkoxides
such as sodium methoxide, sodium ethoxide and potassium
tert-butoxide, metal amides such as sodium amide and
lithium diisopropylamide, metal hydrides such as sodium
hydride and potassium hydride, organic metal compounds
such as phenyllithium and butyllithium, and amines such as
triethylamine, pyridine, «-, p- or 7-picoline,
2,6-lutidine, 4-dimethylaminopyridine,
4-(1-pyrrolidinyl)pyridine, dimethylaniline and
diethylaniline. The reaction is conducted in a suitable
solvent at a temperature ranging from -20°C to the boiling
point of the solvent used, preferably ranging from 0 to
150°C, for 1 minute to 10 days. The solvents employable
for the reaction include liquid ammonia, alcohols (e. g.
methanol, ethanol, propanol, isopropanol, butyl alcohol,
sec-butyl alcohol, tert-butyl alcohol, ethylene glycol,
-15-
mehoxyethanol, ethoxyethanol), ethers (e. g. dimethyl
ether, diethyl ether, tetrahydrofuran, dioxane, monoglyme,
diglyme, aliphatic hydrocarbons (e. g. pentane, hexane,
heptane), aromatic hydrocarbons (e. g. benzene, toluene,
xylene), dimethylformamide, dimethylsulfoxide,
hexamethylphospholamide, sulfolane and the suitable
mixtures thereof.
The condensation can also be conducted by using the
Reformatsky reaction. The reagents employable for the
Reformatsky reaction include zinc, magnesium, aluminum and
tin, and the reaction is conducted in a suitable solvent
at a temperature ranging from -20°C to the boiling point
of the solvent used, preferably ranging from 0 to 150°C,
for 30 minutes to 3 days. The solvents employable for the
reaction include ethers (e.g. dimethyl ether, d,~ethyl
ether, tetrahydrofuran, dioxane, monoglyme, diglyme),
aliphatic hydrocarbons (e. g. pentane, hexane, heptane),
aromatic hydrocarbons (e.g. benzene, toluene, xylene) and
the suitable mixtures thereof.
The reaction conditions for the catalytic reduction
are the same as those for the deesterification at the
-COOR1 and -COORa of the compound (III) (method C).
The starting materials (V) and (VI) can be obtained
easily according to the known methodsdescribed in the
literature. (B. Neises et al., Angew. Chem. Int. Ed.
Engl., 17, 522 (1978)].
Process 2
This is the process whereby an eliminable functional
group B is introduced into the active methylene (the
a-position of the carbonic acid ester) of the compound
(VII); it can be conducted easily by using known reagents
according to a per se known method.
Process 3
The compound (VIII) obtained in the Process 2 is
subjected to condensation with malononitrile or a
- 16-
cyanoacetic acid ester [NC-CHzC00Rb; R6 is the same as
described above] under a basic condition, to give the
compound (IX). The employable bases, solvents and
reaction conditions are in accordance with the known
methods.
Process 4
The compound (IX), when treated with guanidine, can
react at the cyano group or the ester residue followed by
ring. closure to form newly a pyrrolopyrimidine ring. Ring
closure under a basic condition allows the reaction to
proceed advantageously. The employable bases include
metal alkoxi.des such as sodium methoxide, sodium ethoxide
and potassium tert-butoxide. The employable solvents for
the reaction include methanol, ethanol, propanol,
tert-butyl alcohol, dimethylsulfoxide and
hexamethylphospholamide. The reaction temperature ranges
from 0 to 150°C, preferably from 20 to 100°C. The
reaction time ranges from 1 to 4fl hours.
Process 5
The compound (IV-1: Y=NHz or OH) obtained in the
Process 4 can be converted into the compound (II-1: Y=NHz
or OH) by subjecting the ester residue [-COORg] to the
deesterification used in the preparation of the compound
(I-1).
Process 6
The compound (II-1: Y=OH) obtained in the Process 5
is subjected to reduction to give the compound (II-2:
Y=H). The conditions for the reduction are per se known,
and reduction by a metal hydride (e.g. borane, alane or
ate complexes thereof) is employed advantageously.
The Process 5 and the Process 6 may be conducted in
the reverse order. Namely, in the Process 7 the compound
(IV-l: Y=OI-I) is subjected to reduction similar to that in
the Process 6 to give the compound (IV-2: Y=H), which is
then subjected to deesterification in the Process F3 in a
-17-
similar manner as in the Process 5 to give the compound
(II-2: Y=H). Either the deesterification or the reduction
can be selected to be conducted in advance to the other
according to the nature of the substituents in the
compound (IV-1: Y=OH).
In the above Processes 6 and 8, the mixture
containing the compounds (II-2) and (II-2') or the
compounds (IV-2) and (IV-2') may be separated, or each of
the compounds (II-2) and (II-2') or each of the compounds
(IV-2) and (IV-2') is synthesized predominantly by
selective reduction.
Among the compounds (II), those represented by the
formula (II-3: X=OH)
OH R
N/ CH n / \~COOH ( Q - 3
/~ ~ / 'y'
ti~N N N
H
wherein R and n mean the same as described before, can be
obtained also by the following processes.
0
--o'~Y CHO / \
COOR'
HzN ~Y N Y
\~ Compound (XI)
Compound (X) CH=
0 R
Process 9 ~O~N~ CH / \ COOK
n
HZN' \N N
H Compound (XII)
OH R
Process 10
N/ CH n / \ COOK'
HzN N N
H
Compound (XIII)
( Compound (II--4) )
r...
fir
r
.t
-18-
' O I~
n
Process 11 N~ CH ~ ~ COOK'
HxN N N
H
Compound (IV-3~
Process 12
Compound (II-3)
In the Processes described above, R, Rg, Y and n mean
the same as described before and Z means the formula
RCHaCO- wherein R means the same as described above, the
R R
~ I
formula LsP=C-(CH)n-2 wherein L is phenyl, butyl or
cyclohexyl, and R and n mean the same as described above,
O R R
or the formula (MO)ZP-C-(CH)n_2 wherein M is ethyl or
phenyl, and R and n mean the same as described above.
It is preferable that Y is hydrogen.
In the following these Processes are explained.
Process 9
The compound (X) [T. Kondo et al., Chemistry Letters,
419 (19$3)) and a para-substituted benzoic acid ester
derivative (XI) are subjected to condensation (aldol
reaction, Wittig reaction) followed by catalytic reduction
under hydrogen atmosphere, to give the compound (XII).
For the condensation are applicable the reaction
donditions, the reaction solvents, the reaction
temperatures and the reagents used in the Process 1. For
the catalytic reduction under hydrogen atmosphere are
applicable the conditions used in the deesterification of
-COOR1 and -COORa of the compound (III). ,
- 19- 1340r1~4
Process 10
Treatment of the compound (XII) under acidic
conditions can eliminate the protection of the
isopropyloxymethyl group at the 3-position to give the
compound (XIII). The conditions, solvents and
temperatures used in deesterification of -COOR1 and -COORa
of the compound (III) (the method B-1 and the method B-2)
are employable for the reaction.
Process 11
The compound (XIII) obtained in the Process 10 is
subjected to dehydrogenation by a per se known method, to
be easily converted into the compound (IV-3: Y=H).
Process 12
The compound (IV-3: Y=H) obtained in the Process 11
can be converted into the compound (II-3) by
deesterification. The conditions, solvents and
temperatures described in detail for the deesterification
of -COORS and -COORZ of the compound (III) (the methods A,
B-1, B-2 and C) are employable for the reaction. The
processes 10 to 12 may be conducted in any order with the
formation of the respective products, and finally the
desired compound (II-3) is obtained. The order is
determined suitably according to the nature of the
substituents of the compounds (XII), (XIII) and (IV-3).
The compound (II-3) thus obtained can be converted, if
necessary, into the compound (II-2) by a known
substituent-converting reaction on the pyrimidine ring
reported in the literature. [Protein Nucleic acid Enzyme
Extra Issue, Chemical synthesis of nucleic acids, Kyoritsu
Shuppan (1968))
The compounds other than the compound (II-3), wherein
X is hydroxyl can be also converted into the corresponding
compounds wherein X is amino by the above-mentioned
substituent-converting reaction.
134~~1~4
- 20 -
The reactions, reagents and reaction conditions used
in the Processes l to 12 and in the production of the
starting compounds (V) and (XIII) are known and explained
in detail in the following literature.
[J. F. W. Mcomine, Protective Groups in Organic Chemistry,
Plenum Press, London and New York (1973)], [Pine,
Hendrikson, Hammond, Organic Chemistry (4th edition)
[I)-[II], Hirokawa Shoten (1982)), and [M. Fieser and L.
Fieser, Reagents for Organic Synthesis vol. 1-10,
Wiley-Interscience, New York, London, Sydney and Toronto
(1969-1982)].
The intermediates of the compounds of this invention
and the compounds (I) of this invention can be isolated
from the reaction mixtures by the conventional means for
separation and purification, such as concentration,
extraction with solvent, chromatography and
recrystallization.
The compounds (I), (II) and (III) of this invention
may form salts. Such salts are produced by the known
methods, and exemplified by the salts of bases
or acids and quaternary salts. Salts of
bases include salts of alkali metals, alkali earth metals,
non-toxic metals, ammonium and substituted ammonium, such
as sodium, potassium, lithium, calcium, magnesium,
aluminum, zinc ammonium, trimethylammonium,
triethylammonium, triethanolammonium, pyridinium and
substituted pyridinium. Salts of acids include salts of
mineral ac.i.ds such as hydrochloric acid, sulfuric acid,
nitric acid, phosphoric acid and boric acid, and salts of
organic acids such as oxalic acid, tartaric acid, acetic
acid, trifluoroacetic acid, methanesulfonic acid and
camphorsulfonic acid. Quaternary salts include salts of
methyl bromide, methyl iodide, methyl methanesulfonate,
methyl benzensulfonate and methyl p-toluenesulfonate.
When the compounds (I) are used as an active ingredient
of the antitumor agent and they are .in the salts form,
the salts should be pharmaceutically acceptable ones,
~.3~0 ~~~
-21-
Also, the compounds (I), (II) and (IV) may form
zwitter. ion .
As the compounds (I) of this invention, the following
compounds are exemplified:
Diethyl N-[4-[3-(2,4-diamino-7H-pyrrolo[2,3-d)-
pyrimidin-5-yl)propyl]benzoyl]-L-glutamate,
N-[4-[3-(2,4-diamino-7H-pyrrolo[2,3-d]pyrimidin-
5-yl)propyl]benzoyl]-L-glutamic acid,
Diethyl N-[4-[3-(2,4-diamino-6-hydroxy-7H-pyrrolo-
[2,3-d]pyrimidin-5y1)propyl]benzoyl]-L-glutamate,
N-(4-[3-(2,4-diamino-6-hydroxy-7H-pyrrolo[2,3-d]-
pyrimidin-5-yl)propyl]benzoyl]-L-glutamic acid,
Diethyl N-[4-[3-(2-amino-4-hydroxy-7H-pyrrolo[2,3-d]-
pyrimidin-5y1)propyl]benzoyl]-L-glutamate,
N-[4-(3-(2-amino-4-hydroxy-7H-pyrrolo[2,3-d]-
pyrimidin-5-yl)propyl]benzoyl]-L-glutamic acid,
Diethyl
N-(4-[3-(2-amino-4-hydroxy-5,6-dihydropyrrolo[2,3-d]pyrim-
idin-5-yl)propyl]benzoyl]-L-glutamate,
Diethyl
N-[4-(2-(2-amino-4-hydroxy-5,6-dihydropyrrolo-
[2,3-d]pyrimidin-5-yl)ethyl]benzoyl)-L-glutamate,
Diethyl N-[4-['3-(2,4-diamino-5,6-dihydropyrrolo-
[2,3-d)pyrimidin-5-yl)propyl)benzoyl]-L-glutamate,
N-[4-[3-(2-amino-4-hydroxy-5,6-dihydropyrrolo[2,3-d)-
pyrimidin-5-yl)propyl]benzoyl]-L-glutamic acid,
N-[4-[2-(2-amino-4-hydroxy-5,6-dihydropyrrolo[2,3-d]-
pyrimidin-5-yl)ethyl)benzoyl]-L-glutamic acid,
N-[4-[3-(2,4-diamino-5,6-dihydropyrrolo[2,3-d]-
pyrimidin-5-yl)propyl]benzoyl)-L-glutamic acid,
Diethyl N-[4-(3-(2,4-diamino-6,7-dihydro-5H-pyrrolo-
[2,3-d]pyrimidin-5-yl)-1-methylpropyl]benzoyl]-L-
glutamate,
N-[4-[3-(2,4-diamino-6,7-dihydro-5F-I-pyrrolo[2,3-d)-
pyrimidin-5-yl)-1-methylpropyl]benzoyl]-L-glutamic acid,
~.~407~~
22
Diethyl N-(4-[3-(2,4-diamino-7H-pyrrolo[2,3-d]pyrimidin-
5-yl)-1-methylpropyl]benzoyl]-L-glutamate,
N-[4-[3-(2-diamino-7H-pyrrolo[2,3-d]pyrimidin-5-yl)-1-
methylpropyl]benzoyl]-L-glutamic acid,
N-[4-[3-(2,4-diamino-7H-pyrrolo[2,3-d]pyrimidin-5-yl)-2-
methylpropyl]benzoyl]-L-glutamic acid,
N-[4-[3-(2,4-diamino-7H-pyrrolo[2,3-d]pyrimidin-5-yl)-1-
ethylpropyl]benzoyl]-L-glutamic acid,
N-[4-[3-(2,4-diamino-7H-pyrrolo[2,3-d]pyrimidin-5-yl)-2-
ethylpropyl]benzoyl]-L-glutamic acid,
N-[4-[3-(2,4-diamino-7H-pyrrolo[2,3-d]pyrimidin-5-yl)-1-
vinylpropyl]benzoyl]-L-glutamic acid,
N-[4-[3-(2,4-diamino-7H-pyrrolo[2,3-d]pyrimidin-5-yl)-2-
vinylpropylJbenzoyl]-L-glutamic acid,
N-[4-[3-(2,4-diamino-7H-pyrrolo[2,3-d]pyrimidin-5-yl)-1-
allylpropyl]benzoyl]-L-glutamic acid,
N-[4-[3-(2,4-diamino-7H-pyrrolo[2,3-d]pyrimidin-5-yl)-2-
allylpropyl]benzoyl]-L-glutamic acid,
N-[4-[3-(2,4-diamino-?H-pyrrolo[2,3-d]pyrimidin-5-yl)-1-
(propen-1-yl)propyl]benzoyl]-L-glutamic acid,
N-[4-[3-(2,4-diamino-7H-pyrrolo[2,3-d]pyrimidin-5-yl)-2-
(propen-1-yl)propyl]benzoyl]-L-glutamic acid,
N-[4-[3-(2,4-diamino-7H-pyrrolo[2,3-d]pyrimidin-5-yl)-1-
ethynylpropyl]benzoyl]-L-glutamic acid,
N-[4-[3-(2,4-diamino-7H-pyrrolo[2,3-d]pyrimidin-5-yl)-2-
ethynylpropyl]benzoyl]-L-glutamic acid,
N-[4-[3-(2,4-diamino-7H-pyrrolo[2,3-d]pyrimidin-5-yl)-1-
propargylpropyl]benzoyl]-L-glutamic acid,
r~~
1~40r1~~
23
N-[4-[3-(2,4-diamino-7H-pyrrolo[2,3-d]pyrimidin-5-yl)-2-
propargylpropyl]benzoyl]-L-glutamic acid,
N-[4-[3-(2,4-diamino-7H-pyrrolo[2,3-d]pyrimidin-5-yl-1-
(propyn-1-yl)propyl]benzoyl]-L-glutamic acid,
N-[4-[3-(2,4-diamino-7H-pyrrolo[2,3-d]pyrimidin-5-yl)-1-
(propyn-1-yl)propyl]benzoyl]-L-glutamic acid,
N-[4-[3-(2,4-diamino-7H-pyrrolo[2,3-d]pyrimidin-5-yl)-2-
(propyn-1-yl)propyl]benzoyl]-L-glutamic acid,
N-[4-(3-(2,4-diamino-6,7-dihydro-5H-pyrrolo[2,3-d]
pyrimidin-5-yl)-2-methylpropyl]benzoyl]-L-glutamic acid,
N-[4,[3-(2,4-diamino-6,7-dihydro-5H-pyrrolo[2,3-d]
pyrimidin-5-yl)-1-ethylpropyl]benzoyl]-L-glutamic acid,
N-[4-[3-[2,4-diamino-6,7-dihydro-5H-pyrrolo[2,3-d]
pyrimidin-5-yl)-2-ethylpropyl]benzoyl]-L-glutamic acid,
N-[4-[3-(2,4-diamino-6,7-dihydro-5H-pyrrolo[2,3-d]
pyrimidin-5-yl)-1-vinylpropyl]benzoyl]-L-glutamic acid,
N-(4-[3-(2,4-diamino-6,7-dihydro-5H-pyrrolo[2,3-d]
pyrimidin-5-yl)-2-vinylpropyl]benzoyl]-L-glutamic acid,
N-[4-[3-(2,4-diamino-6,7-dihydro-5H-pyrrolo[2,3-d]
pyrimidin-5-yl-1-allylpropyl]benzoyl]-L-glutamic acid,
N-[4-[3-(2,4-diamino-6,7-dihydro-5H-pyrrolo[2,3-d]
pyrimidin-5-yl)-2-allylpropyl]benzoyl-L-glutamic acid,
N-[4-[3-(2,4-diamino-6,7-dihydro-5H-pyrrolo[2,3-d]
pyrimidin-5-yl)-1-(propen-1-yl)propyl]benzoyl]-L-glutamic acid,
N-[4-[3-(2,4-diamino-6,7-dihydro-5H-pyrrolo[2,3-d]
pyrimidin-5-yl)-2-(propen-1-yl)propyl]benzoyl]-L-glutamic acid,
N-[4-[3-(2,4-diamino-6,7-dihydro-5H-pyrrolo(2,3-d]
pyrimidin-5-yl)-1-ethylpropyl]benzoyl]-L-glutamic acid,
~~~o~~~.
24
N-[4-[3-(2,4-diamino-6,7-dihydro-5H-pyrrolo[2,3-d]
pyrimidin-5-yl)-2-ethylpropyl]benzoyl]-L-glutamic acid,
N-[4-[3-(2,4-diamino-6,7-dihydro-5H-pyrrolo[2,3-d]
pyrimidin-5-yl)-1-propargylpropyl]benzoyl]-L-glutamic acid,
N-[4-[3-(2,4-diamino-6,7-dihydro-5H-pyrrolo[2,3-d]
pyrimidin-5-yl)-2-propargylpropyl]benzoyl]-L-glutamic acid,
N-[4-[3-(2,4-diamino-6,7-dihydro-5H-pyrrolo[2,3-d]-
pyrimidin-5-yl)-1-(propyn-1-yl)propyl)benzoyl]-L-glutamic acid,
N-[4-[3-(2-4-diamino-6,7-dihydro-5H-pyrrolo[2-3,d]
pyrimidin-5-yl)-2-(propyn-1-yl)propyl]benzoyl]-L-glutamic acid.
,!
- 25 -
Effects
The compounds (I) of this invention show excellent
antitumor effects in mouse tumor cell strains (P388, L1210,
L5178Y, B16 melanoma, MethA, Lewis Lung Carcinoma, 5180 sarcoma,
Ehrlich Carcinoma, Colon38) and human tumor cell strains (HL60,
KB, Lu65), decrease the tumors carried by warm-blooded animals
[e. g. melanoma, sarcoma, mastocytoma, carcinoma, neoplasia,
etc.] and prolong the life-span of tumor-carrying warm-blooded
animals.
In the following are described the results indicating the
pharmaceutical effects of the compounds (I) of this invention.
The cell growth inhibiting effect (IC50) of the compounds
obtained in the Working Examples described below in KB cells was
determined by the following method.
Human nasopharyngeal cancer KB cells (1 x 104 cells/ml)
prepared according to a conventional method were inoculated into
each well of the 96-microwell plate (0.1 ml in a well) and
subjected to standing culture at 37°C under 5% C02 for 24 hours.
To this was added a solution of one of the compounds obtained in
the Working Examples in 10% MEM (Nissui Pharmaceutical Co.
Ltd.), and subjected again to standing culture at 37°C under 5%
C02 for 72 hours. Then the culture was pipetted out, and
another 0.1 ml of the solution of MTT (Dojindo Laboratories) in
10% MEM (1.0 mg/ml) was added and incubated at 37°C for 4 hours.
Then 0.1 ml of the 10% SDS solution (Wako Pure Chemicals) was
added and incubated at
~ ~~ ;)
b
~.3~079~
-26-
37°C for further 24 hours. The absorbance at 590 nm was
measured and the ICso value of the compound was defined as
the concentration of the compound required to decrease the
number of cells in the untreated control group by 50~.
The results obtained are shown in Table 1.
Table 1
Test compound ICso (~g/ml)
Compound of Working Example 4 0.0003
Compound of Working Example 6 0.08
Compound of Working Example 16 0.0006
In addition, the following are described the results
indicating the pharmaceutical effects of the compounds (I)
of this invention.
The cell growth inhibiting effect (ICSp) of the
compound obtained in the Working Example 14 described
below in HL-60 and HEL cells was determined by the
following method.
(1) Human Leukemia cells HL-60 (2 x 105 cells/ml) were
suspended in the GIT~culture medium (Wako Pure Chemicals)
containing the compound of this invention and 0.2 ml of
the suspension was inoculated into each well of the
96-microwell plate. After standing culture at 37°C under
5$ C02 for 68 hours, 1 uCi of [3H]-thymidine (5 Ci/mmol)
was added and the mixture was incubated for further 4
hours. For measurement of the incorporation of thymidine
into the cells, the acid-insoluble fraction was collected
on a glass filter, and the radioactivity of the fraction
Bias measured by a liquid scintillation counter. The IC50
value of the compound was defined as the concentration of
the compound required to decrease the radioactivity
incorporated into the cells in the untreated control group
by 50~.
~ r~ ~~~~--~ q~K
1340'~~~~
-27-
(2) Human fetal normal lung fibroblasts HEL (1 x 104
cells/ml) were suspended in the MEM culture medium (Nippon
Flow Laboratories) and 0.1 ml of the suspension was
inoculated into each well of the 96-microwell plate.
After standing culture at 37°C under 5~ C02 for 24 hours,
MEM Culture medium containing the compound of this
invention was added and the mixture was incubated for
further 72 hours. The medium was replaced by the medium
containing 1 ~g/ml of MTT (Dojindo Laboratories), to which
was added 10~ SDS (Wako Pure Chemicals), and incubated
overnight. Absorbance at 590 nm was measured by he
Multiscan (Titertec Co.). The ICSp value was determined
by comparing the absorbance in the untreated control
group. The results obtained are shown in Table 1.
Table 1
Test compound HL-60 HEL
( ng/ml ) ( ~g/ml )
Compound of Working Example 14 0.04 >20.0
As shown by the above-mentioned results, the
compounds (I) are excellent in inhibition of cell growth
of KB and HL-60, while they do not exert a toxicity
against HEL. The compounds (I) of this invention and the
salts thereof are of low toxicity, having remarkable antitumor
effect. Therefore, the preparations containing the
compound (I) or salts thereof can be employed as antitumor
agents for the treatment of tumors in warm-blooded
~.nimals, particularly mammals (e. g. mouse, rat, cat, dog,
rabbit, etc.).
The compounds (I) and salts thereof, when used as
antitumor agents, can be administered orally and
Parenterally as they are or in the forms of powders,
~3~Q'~~
_2g_
granules, tablets, capsules, suppositories and injections,
which are prepared according to the conventional methods
using pharmaceutically acceptable excipients, vehicles,
and diluents. The dose varies according to the animals,
diseases, symptoms, compounds and administration routes;
for example, the daily dose is about 2.0 to 100 mg of a
compound of this invention per kg of body weight of a
warm-blooded animal described above for oral
administration, and about 1.0 to 50 mg/kg for parenteral
administration. Injections may be administered
intramuscularly, intraperitoneally, subsutaneously or
intravenously.
The preparations are produced by the per se known
processes. For the above-mentioned oral preparations, for
example, tablets are produced by suitable combination with
a binder (e. g. hydroxypropylcellulose,
hydroxypropylmethylcellulose, macrogol, etc.), a
disintegrator (e. g. starch, calcium
carboxylmethylcellulose, etc.) and a lubricant (e. g.
magnesium stearate, talc, etc.).
As parenteral preparations, for example, injections
are produced by suitable combination with an agent to provide isotonicity
(e. g. glucose, D-sorbitol, D-mannitol, sodium chloride,
etc.), an antiseptic (e. g. benzyl alcohol, chlorobutanol,
methyl p-hyrdoxybenzoate, propyl p-hydroxybenzoate, etc.)
and a buffer (e. g. phosphate buffer, sodium acetate
buffer, etc.).
An example process for production of tablets
comprises mixing about 1.0 to 25 mg of the compound of
this invention, 100 to 500 mg of lactose, about 50 to 100
mg of corn starch and about 5 to 20 mg of
hydroxypropylcellulose for preparation of a tablet by a
conventional means, granulating, mixing with corn starch
and magnesium stearate and tabletting, so that tablets
each weighing about 100 to 500 mg with the diameter of
i~~~'~9~~
-29-
about 3 to 10 mm are obtained. The tablets may be coated
with a mixture of acetone and ethanol, the mixture
containing hydroxypropylmethylcellulose phthalate(about 10
to 20 mg per tablet) and castor oil (0.5 to 2 mg) at a
concentration of about 5 to 10~, to give enteric coated
tablets.
An example process for an injectable preparation
comprises dissolving about 2.0 to 50 mg of a sodium salt
of the compound of this invention in about 2 ml of
physiological saline for preparation of an ampoule,
sealing the resultant solution in an ampoule and
sterilizing the ampoule at 110°C for about 30 minutes or
adding about 2 ml of sterile distilled water containing about
10 to 40 mg of mannitol or sorbitol into the ampoule,
freeze-drying and sealing the ampoule. For use~of the
freeze-dried compound for subcutaneous, intravenous or
intramuscular injection, the ampoule is opened and the
content is dissolved in, for example, physiological saline
so that the concentration of the compound may be about 1.0
to 25 mg/ml.
The following Reference Examples and Working Examples
will explain the present invention more concretely.
Reference Example 1
Production of methyl 5-[4-(tert-butoxycarbonyl)-
phenyl]pentanoate;
Under an atmosphere of argon, potassium (25 g) was
added to dried tert-butyl alcohol (a20 ml), which was
refluxed by heating to be dissolved completely. The
solution was cooled to 20°C, to which ether (300 ml) was
added and then a solution of methyl crotonate (63.93 g)
and tert-butyl 4-formylbenzoate (71.0 g) in tert-butyl
alcohol-ether (2:1, 300 ml) was added slowly while the
inner temperature was kept at 10°C. After stirring at the
same temperature for 2 hours, 1 N potassium hydrogen
sulfate in water (750 ml) was added with cooling so that
~~~~~1 ~~
-30-
the pH was adjusted to 4. The solution was extracted
with ether, washed with water and then with saturated
sodium chloride solution and subjected to evaporation of
the solvent under reduced pressure. The resultant residue
was dissolved in ethyl acetate (100 ml), to which 5~Pd-C
(15 g: Engelhard Co. Ltd.) was added and stirred
vigorously under hydrogen pressure of 4 kg/cm' at room
temperature for 3 hours. The catalyst was filtrated off,
the solvent was evaporated under reduced pressure, to the
residue were added dried methanol (200 ml),
4-(N,N-dimethylamino)pyridine (30 mg) and dichloromethane
(250 ml), and then a solution of
1,3-dicyclohexylcarbodiimide (132 g) in dichloromethane
(250 ml) was slowly added dropwise at 0°C. After stirring
at room temperature for 18 hours, the mixture was cooled to
0°C; acetic acid (30 ml) was added and the mixture was stirred
at 0°C for 30 minutes and then at room temperature for 30
minutes. The resultant precipitate was filtrated off, the
filtrate was concentrated to dryness under reduced
pressure, to the residue was added ethyl acetate {100 ml)and,
after keeping at 0°C for 2 hours, the resultant precipitate
was again filtrated off. The filtrate was concentrated
under reduced pressure and the residue was purified by
column chromatography (carrier; silica gel, 100 g,
developing solvent; ether: hexane = 1:15 -~ 1:5), to give
the object compound (59.7 g).
melting point (Bp) 145-155°C/0.2-0.3 mmHg
IR (Neat): 2980, 2950, 1740, 1712, 1605 cm-I.
1H-NMR (CDCls) d: 1.40-1.75 (4H,m), 1.55 (9H,s),
2.15-2.45 (2H,m), 2.50-2.75 (2H,m), 3.62 (3H,s),
7.16 (2H,d,J=8Hz), 7.85 (H,d,J=8Hz).
Reference Example 2
Production of methyl 5-[4-(tert-butoxycarbonyl)-
phenyl]-2-iodopentanoate:
i~4~'l9~
-31-
Under an atmosphere of argon, to a solution of
diisopropylamine (2.48 g) in tetrahydrofuran (100 ml) was
added a solution of butyllithium (24.5 mmol) in hexane
(15.3 ml) at 0°C and stirred for 10 minutes; to this a
solution of the compound (6.53 g) obtained in the
Reference Example 1 in tetrahydrofuran (50 ml) was added
dropwise at -78°C over 30 minutes. After stirring for 30
minutes, a solution of iodine (5.66 g) in tetrahydrofuran
(30 ml) was added and stirred for further 20 minutes. The
temperature of the solution was brought up to 0°C over 30
minutes, 1 N potassium hydrogen sulfate in water (30 ml)
was added dropwise, and the solution was extracted with
ether after adjustment to pH 4. The organic layer was
washed with 1 N potassium carbonate in water and then with
saturated sodium chloride solution, and dried v~iith
anhydrous magnesium sulfate. The residue obtained by
evaporation of the solvent under reduced pressure was
purified by column chromatography (ether-hexane, 1:9), to
give the object compound (4.736 g).
IR (Neat): 2990, 2905, 1744, 1718, 1612 cm-'.
'H-NMR (CDCls) 6: 1.45-1.80 (2H,m), 1.58 (9H,s),
1.80-2.16 (2H,m), 2.69 (2H,t,J=7Hz), 3.72 (2H,s),
4.30 (lH,t,J=7Hz), 7.20 (2H,d,J=8Hz),
7.90 (2H,d,J=$Hz).
Reference Example 3
Preparation of methyl 5-[4-(tert-butoxy
carbonyl)phenyl]-2-(dicyanomethyl)pentanoate:
To a suspension of sodium hydride (1.356 g) in
dimethylsulfoxide (8 ml) was added a solution of
malononitrile (3.37 g) in dimethylsulfoxide (8 ml) under
cooling with water, and stirred for 15 minutes. To this
solution was added dropwise a solution of the compound
(4.736 g) obtained in the Reference Example 2 in
dimethylsulfoxide (12 ml) and stirred at room temperature
for 1 hour; to this 45 ml of 1N potassium hydrogen
134Q'~~~
-32-
sulfate in water was added at 0°C, followed by extraction
with ether. The ether layer was washed with water and
dried with anhydrous magnesium sulfate, followed by
evaporation of the solvent under reduced pressure. The
residue was purified by column chromatography (carrier;
silica gel, 200 g, developing solvent; ethyl acetate:
hexane = 1:5), to give the object compound (3.33 g).
IR (Neat): 2970, 2930, 2252 1740, 1713, 1608 cm-1
1H-NMR (CDCls) b: 1.60-2.05 (4H,m), 1.48 (9H,s),
2.70 (2H,brt,J=7Hz), 2.90-3.15 (lH,m), 3.82 (3H,s),
4.04 (lH,d,J=7Hz), 7.20 (2H, d,J=8Hz),
7.92 (2H,d,J=8Hz).
Reference Example 4
Production of methyl 4-[3-(2-amino-7-benzyl-3-
isopropyloxymethyl-4(3H)-oxopyrrolo[2,3-d]pyriinidin-5-yl)-
-1-oxo-2-propenyl]benzoate:
2-Amino-7-benzyl-3-isopropyloxymethyl-4(3H)-oxo-
pyrrolo[2,3-d]pyrimidine-5-carbaldehyde (1.7 g) was
suspended in a methanol-tetrahydrofuran mixture (10:1, 33
ml), to which a solution of sodium methylate in methanol
(equivalent to 6.25 mM, 3.75 ml) was added to dissolve.
Then 4-
methoxycarbonylacetophenone (2.23 g) was added and stirred
at room temperature for 15 hours. The precipitate was
collected by filtration, washed with a small amount of
methanol and ether and dried, to give the object compound
(2.02 g) as yellow needles.
IR (KBr): 3480, 3350, 1710, 1680, 1620, 1550,
1375, 1280, 1210, 1110, 1060, 775. cm-'.
1H-NMR (CDCls) a: 1.23 (6H,d,J=6Hz), 3.93 (3I-I,s),
3.80-4.07 (lH,m), 5.15 (2H,s), 5.63 (2H,s),
6.92 (lH,s), 7.10-7.40 (5H, m), 7.73 (lH,d,J=l5Hz),
8.13 (4H,s), 8.60 (lH,d,J-l5Hz).
Reference Example 5
Production of methyl 4-[3-(2-amino-3-
13~0"~~
-33-
isopropyloxymethyl-4(3H)-oxo-5,6-dihydropyrrolo-
[2,3-d)pyrimidin-5-yl)propyl]benzoate:
The compound (2.01 g) obtained in Reference Example 4
was dissolved in a methanol-tetrahydrofuran mixture (3:4,
350 ml), to which 1 N hydrochloric acid (8 ml) and 10~k
Pd-C (4 g, manufactured by Engelhard Co. Ltd.) were added,
and subjected to catalytic reduction under an atmosphere
of hydrogen for 48 hours. The catalyst was filtrated off,
the filtrate was neutralized, the solvent was evaporated
off under reduced pressure and the residue was isolated
and purified by column chromatography on silica gel
(carrier; 100 g, developing solvent; chloroform containing
2-4~ of ethanol), to give the object compound (0.68 g) as
a colorless powder.
IR (KBr): 3210, 2980, 1725, 1625, 1580, 1510,
1435, 1275, 1175, 1100, 1060 cm-1.
1H-NMR (CDCls) d: 1.17(3H,d,J=6Hz), 1.19
(3H,d,J=6Hz), 1.50-2.13 (4H,m), 2.70 (2H,t,J=7.5Hz),
3.07-3.77 (3H,m), 3.80-4.60 (lH,m), 3.87 (3H,s), 5.03
and 5.57 (2H,ABq), 7.21 (2H,d,J=7.5Hz), 7.91
(2H,d,J=7.5Hz).
Reference Example 6
Production of methyl 4-[3-(2-amino-4-hydroxy-5,
6-dihydropyrrolo[2,3-d]pyrimidin-5-yl)propyl]benzoate:
The compound (0.66 g) obtained in the Reference
Example 5 was disolved in dried tetrahydrofuran (31.5 ml),
to which 0.21 N hydrogen bromide in dichloromethane (78.3
ml) was added and stirred at room temperature for 20
hours. Then 3 volumes of n-hexane was added and the
resultant precipitate was collected by filtration, to give
the dihydrobomide of the object compound (0.59 g) as a
colorless powder.
IR (KBr): 3290, 3030, 2950, 1720, 1690, 1680
1620, 1480, 1350, 1275, 1100, 1035, 760 cm-1.
1H-NMR (DMSO-ds) B: 1.40-1.83 (4H,broad),
g
-34-
2.65 (2H,t,J=7.5Hz), 3.07-3.37 (2H,m), 3.50-3.77
(1H),m), 3.82 (3H,s), 7.33 (2H,d,J=7.5Hz),
7.86 (2H,d,J=7.5Hz).
Reference Example 7
Production of diethyl N-[4-[3-(2-amino-4-hydroxy-5,6-
dihydropyrrolo[2,3-d)pyrimidin-5-yl)propyl)benzoyl)-L-g-
lutamate:
The compound (1.47 g) obtained in the Reference
Example 6 was suspended in tetrahydrofuran (60 ml), to
which 0.1 N sodium hydroxide in water (120 ml) was added
and stirred at room temperature for 21 hours. Then the
solution was neutralized with 0.1 N hydrochloric acid (60
ml) and concentrated to dryness under reduced pressure.
The residue was suspended in dried dimethylformamide
(112.5 ml), to which diethyl L-glutamate hydrochloride
(2.88 g), diphenylphosphoryl azide (1.295 ml) and
triethylamide (2.52 ml) were added, brought back to the
room temperature and stirring was continued for 63 hours. The
resulting precipitate was filtrated off, and the filtrate
was concentrated to dryness under reduced pressure, The
residue was subjected to separation-purification with
column chromatography on silica gel (carrier; 100 g,
developing solvent; chloroform containing 6.9~
ammonia-containing ethanol, 1:20 --~ 1:10), to give the
object compound (1.12 g) as a colorless powder.
IR (KBr): 3330, 2930, 1740, 1670, 1640, 1570,
1540, 1440, 1375, 1300, 1200, 1095, 1020 cm-1.
1H-NMR (CDCls-CDsOD) S: 1.20 (3H,t,J=7.5Hz),
1.27 (3H,t,J=7.5Hz), 1.47-1.83 (4H,m),
2.0-2.36 (2H,m), 2.37-2.50 (2H,m), 2.67
(2H,t,J=7.5Hz), 3.10-3.37 (2H,m), 3.53-3.80 (lH,m),
3.96-4.33 (4H,q x 2,J=7.5Hz), 4.60-4.87 (lH,m),
7.25 (2H,d,J=9Hz), 7.75 (2H,d,J=9Hz).
Reference Example 8
-35-
Production of methyl 4-[3-(2-amino-7-benzyl-3-
isopropyloxymethyl-4(3H)-oxopyrrolo[2,3-d]pyrimidin-5-
yl)-1-oxo-2-propenyl]benzoate:
2-Amino-7-benzyl-3-isopropyloxymethyl-4(3H)-oxo-
pyrrolo[2,3-d]pyrimidine-5-carbaldehyde (1.7 g) was
suspended in a methanol-tetrahydrofuran mixture (10:1, 33
ml), to which a solution of sodium methylate in methanol
(equivalent to 6.25 mM, 3.75 ml) was added to dissolve.
Then 4-methoxycarbonylacetophenone (2.23 g) was added and
stirred at room temperature for 15 hours. The precipitate
was collected by filtration, washed with s small amount of
methanol and ether, and dried, to give the object compound
(2.02 g) as yellow needles.
IR (KBr): 3480, 3350, 1710, 1680, 1620, 1550, 1375,
1280, 1210, 1110, 1060, 775 cm-i~
'H-NMR (CDCls) b: 1.23 (6H,d,J=6Hz), 3.93 1(l3H,s),
3.80-4.07 (lH,m), 5.15 (2H,s), 5.63 (2H,s), 6.92
(lI-i,s), 7.10-7.40 (5H,m), 7.73 (lH,d,J=lSHz), 8.13
(4H,s), 8.60 (lH,d,J=l5Hz).
Reference Example 9
Production of methyl 4-[3-(2-amino-3-isopropyloxy-
methyl-4(3H)-oxo-5,6-dihydropyrrolo[2,3-d]pyrimidin-5-
yl)propyl]benzoate:
The compound (2.01 g) obtained in Reference Example 8
was dissolved in a methanol-tetrahydrvfuran mixture (3:4,
350 ml), to which 1 N hydrochloric acid (8m1) and 10~ Pd-C
(4 g, manufactured by Engelhard Co. Ltd.) were added, and
subjected to catalytic reduction under an atmosphere of
hydrogen for 48 hours. The catalyst was filtrated off,
the filtrate was neutralized, the solvent was evaporated
off under reduced pressure, and the residue was isolated
and purified by column chromatography on silica gel
(carrier; 100 g) (developing solvent: chloroform
containing 2-4~ of ethanol), to give the object compound
(0.68 g) as a colorless powder.
-36- 1340794
IR (KBr): 3210, 2980, 1725, 1625, 1580, 1510, 1435,
1275, 1175, 1100, 1060 cm-1.
1H-NMR (CDCls) S: 1.17 (3H,d,J=6Hz),
1.19(3H,d,J=6Hz), 1.50-2.13 (4H,m), 2.70
(2H,t,J=7.5Hz), 3.07-3.77 (3H,m), 3.80-4.06 (lH,m),
3.87 (3H,s), 5.03 and 5.57 (2H,ABq), 7.21
(2H,d,J=7.5Hz), 7.91 (2H,d,J=7.5Hz).
Reference Example 10
Production of methyl 4-[3-(2-amino-4-hydroxy-5,6-
dihydropyrrolo[2,3-d]pyrimidin-5-yl)propyl]benzoate:
The compound (0.66 g) obtained in the Reference
Example 9 was dissolved in dried tetrahydrofuran (31.5
ml), to which 0.21 N hydrogen bromide acid in
dichloromethane (78.3 ml) was added, and stirred at room
temperature for 20 hours. Then 3 volumes of n-hexane was
added and the resultant precipitate was collected by
filtration, to give the dihydrobromide of the object
compound (0.59 g) as a colorless powder.
IR (KBr): 3290, 3030, 2950, 1720, 1690, 1680,
1620, 1480, 1350, 1275, 1100, 1035, 760
cm-1.
1H-NMR (DMSO-ds) s: 1.40-1.83 (4H, broad), 2.65
(2H,t,J=7.5Hz), 3.07-3.37 (2H,m), 3.50-3.77 (lH,m),
3.82 (3H,s), 7.33 (2H,d,J=7.5Hz), 7.86
(2H,d,J=7.5Hz).
Reference Example 11
Production of methyl 4-[2-(2-amino-7-benzyl-3-
isopropyloxymethyl-4(3H)-oxopyrrolo[2,3-d]pyrimidin-5-yl)-
ethenyl]benzoate:
To the suspension of 2-amino-7-benzyl-3-isopropyloxy-
methyl-4(3H)-oxopyrrolo[2,3-d]pyrimidine-5-carbaldehyde
(2.04 g) in dried methanol (84 ml) was added
p-methoxycarbonylbenzyltriphenylphosphonium bromide (3.24
37
g) and stirred. Then a solution of sodium methylate in
methanol (equivalent to 6.6 mM on sodium basis) was added
and stirred at room temperature for 1.5 hours, to give
yellow needles. The needles were collected by filtration,
washed with methanol and then with ether, and dried, to
give the object product (cis-form, 1.49 g). The mother
liquor was purified by column chromatography on silica gel
(carrier: 100 g) (developing solvent: ethyl
acetate-hexane, 1:4-~1:3), to give the cis-trans mixture of
the object compound (0.9 g) as yellow powders.
cis-form;
IR (KBr): 3340, 3220, 2980, 1715, 1690, 1625,
1600, 1530, 1430, 1280, 1175, 1105,
1060, 995 cm-1.
1H-NMR (CDCls) b: 1.20 (6H,d,J=6Hz), 3.87 (3H,s),
3.80-4.07 (lH,m), 5.14 (2H,s), 5.32 (2H,s), 5.60
(2H,s), 6.77 (lH,s), 7.10-7.37 (5H,m), 7.43 (2H,s),
7.50 (2H,d,J=9Hz), 7.95 (2H,d,J=9Hz).
Reference Example 12
Production of methyl 4-[2-(2-amino-3-isopropyloxy
methyl-4(3H)-oxo-5,6-dihydropyrrolo[2,3-d]pyrimidin-5-
yl)ethyl]benzoate:
The compound (1.6 g) obtained in the Reference
Example 11 was subjected to the same reaction to that in
the Reference Example 9, to give the object compound (0.62
g)~
1H-NMR (CDCls) a: 1.17 (3H,d,J=6Hz), 1.20
(3H,d,J=6Hz), 1.47-2.0 (lH,m), 2.10-2.43 (lH,m), 2.65
(2H,t,J=9Hz), 2.97-3.60 (3H,m), 3.73-4.07 (lH,m),
3.90 (3H,s), 4.47 (2H,s), 5.30 (lH,d,J=l2Hz), 5.60
(lH,d,J=l2Hz), 7.13-7.50 (7H,m), 7.92 (lH,d,J=9Hz).
Reference Example 13
~~~o~~~~
-38-
Production of methyl 4-[2-(2-amino-4-hydroxy-7H-5,6-
dihydropyrrolo[2,3-d)pyrimidin-5-yl)ethyl)benzoate:
The compound (1.25 g) obtained in the Reference
Example 12 was subjected to the same reaction to that in
the Reference Example 10, to give the object compound
(0.51 g).
IR (KBr): 3400, 3300, 2920, 1740, 1710, 1680, 1640,
1600, 1570, 1435, 1310, 1280, 1110, 1020
cm-1.
'H-NMR (DMSO-d6/D20) b: 1.53-2.27 (2H,m), 2.70
(2H,t,J=9Hz), 3.00-3.26 (2H,m) 3.47-3.63 (lH,m), 3.83
(3H,s), 7.35 (2H,d,J=9Hz), 7.85 (2H,d,J=9Hz)
Reference Example 14
Production of methyl 5-[4-(tert-butoxycarbonyl)-
phenyl]pentanoate:
Under an atmosphere of argon, potassium (25 g) was
dissolved completely in dried tert-butyl alcohol (820 ml)
by refluxing by heating for 3 hours. The solution was
cooled to 20°C, to which was added ether (300 ml) and then
slowly a solution of methyl crotonate (63.93 g) and
tert-butyl 4-formylbenzoate (71.0 g) in tert-butyl
alcohol-ether mixture (2:1, 300 ml) while keeping the
inner temperature at 10°C.
The mixture was stirred at the same temperature for 2
hours and 1 N potassium hydrogen sulfate in water
(750 ml) was added with cooling to adjust the pH to 4.
After extraction with ether, the ether layer was washed
with saturated sodium chloride solution and the solvent
was evaporated off under reduced pressure. The residue
was dissolved in ethyl acetate (100 ml), to which was
added 5$ Pd-C (15 g: manufactured by Engelhard Co. Ltd.),
and stirred vigorously at room temperature under hydrogen
pressure of 4 kg/cm2 for 3 hours. The catalyst was
filtered off, the solvent was evaporated off under
-39-
reduced pressure, and dried methanol (200 ml),
4-(N,N-dimethylamino)pyridine (30 mg) and dichloromethane
(250 ml) were added, to which a solution of
1,3-dicyclohexylcarbodiimide (132 g) in dichloromethane
(250 ml) was added slowly dropwise at 0°C. After stirring
at room temperature for 18 hours, the mixture was cooled
to 0°C. Acetic acid (3G ml) was added, and the mixture was
stirred at 0°C for 30 minutes and then at room temperature
for 30 minutes. The resulting precipitate was filtered
off, the filtrate was concentrated to dryness under
reduced pressure, and to the residue was added ethyl
acetate (100 ml), which was left standing at 0°C for 2
hours, and the resulting precipitate was again filtered
off. The filtrate was concentrated under reduced
pressure, and the residue was purified by column
chromatography (carrier: silica gel, 500 g, ether-hexane,
1:15-1:5), to give the object compound (59.7 g).
Bp. 145-155°C/0.2-0.3mmHg.
IR (Neat): 2980, 2950, 1740, 1712, 1605 cm-1.
1H-NMR (CDCls) b: 1.40-1.75 (4H,m), 1.55 (9H,s),
2.15-2.45 (2H,m), 2.50-2.75 (2H,m), 3.62 (3H,s), 7.16
(2H,d,J=8Hz), 7.85 (H,d,J=8Hz).
Reference Example 15
Production of methyl 5-[4-(tert-butoxycarbnyl)-
phenyl]-2-iodopentanoate:
Under an atmosphere of argon, a solution of
butyllithium (24.5 mmol) in hexane (15.3 ml) was added to
a solution of diisopropylamine (2.48 g) in tetrahydrofuran
(100 ml) at 0°C and stirred for 10 minutes. To the
resultant solution was added a solution of the compound
(6.53 g) obtained in the Reference Example 14 in
tetrahydrofuran (50 ml) at -78°C dropwise over 30 minutes.
After stirring for 30 minutes a solution of iodine (5.66
g) in tetrahydrofuran (30 ml) was added and stirred for
134~Y~~
-40-
further 20 minutes. The temperature was increased to 0°C
over 30 minutes, 30 ml of 1 N potassium hydrogen sulfate
in water was added dropwise, and the pH was adjusted to 4,
followed by extraction with ether. The organic layer was
washed with 1 N potassium carbonate in water and then with
saturated sodium chloride solution, and dried with
anhydrous magnesium sulfate. The solvent was evaporated
off under reduced pressure, and the resultant residue was
purified by column chromatography (carrier: silica gel,
ZO 100 g, ether-hexane, 1:9), to give the object compound
(4.736 g).
IR (Neat): 2990, 2905, 1744, 1718, 1612 cm-1.
1H-NMR (CDCls) b: 1.45-1.80 (2H,m), 1.58 (9H,s),
1.80-2.16 (2H,m), 2.69 (2H,t,J=7Hz), 3.72 (2H,s),
4.30 (lH,t,J=7Hz), 7.20(2H,d,J=8Hz),
7.90(2H,d,J=8Hz).
Reference Example 16
Production of methyl 5-[4-(tert-butoxycarbonyl)-
phenyl]-2-(dicyanomethyl)pentanoate:
To a suspension of sodium hydride (1.356 g) in
dimethylsulfoxide (8 ml) was added a solution of
malononitrile (3.37 g) in dimethylsulfoxide (8 ml) with
ice-cooling and stirred for 15 minutes. To the solution
was added a solution of the compound (4.736 g) obtained in
the Reference Example 15 in dimethylsulfoxide (12 ml)
dropwise, and the mixture was stirred at room temperature
for 1 hour. Then 45 ml of 1 N potassium hydrogen sulfate
in water was added at 0°C, followed by extraction with
ether. The ether layer was washed with water and dried
with anhydrous magnesium sulfate. The residue obtained by
evaporation of the solvent under reduced pressure was
purified by column chromatography (carrier: silica gel,
200 g, ethyl acetate-hexane, 1:5), to give the object
compound (3.33 g).
~3~ ~~~~~
-41-
IR (Neat): 2970, 2930, 2252, 1740, 1713, 1608cm-i.
'H-NMR (CDCls) d: 1.60-2.05 (4H,m), 1.48 (9H,s),
2.70 (2H,brt,J=7Hz), 2.90-3.15 (lH,m), 3.82(3H,s),
4.04(iH,d,J=7Hz), 7.20(2H,d,J=8Hz), 7.92(2H,d,J=8Hz).
Reference Example 17
Production of ethyl 5-[4-(tert-butoxycarbonyl)-
phenyl]hexanoate:
In a solution of tert-butyl 4-acetylbenzoate (19.90
g) in a benzene-ether-tetrahydrofuran mixture (3:3:2, 200
ml) was suspended zinc (11.81 g), to which ethyl
4-bromocrotonate (17.44 g) was added slowly while heating
and stirring, and then iodine (about 20 mg) was added.
The resulting mixture was refluxed by heating on an oil
bath (60-70°C) for 1 hour, then ethyl 4-bromocrotonate (3.00
".
g) was added, and the mixture was further refluxed by heating for 15
minutes. After cooling to room temperature, the reaction
mixture was added to water (500 ml), adjusted to pH 4.9 by
addition of acetic acid and extracted with ether. The
extract was washed with 5~ aqueous ammonia and dried with
anhydrous magnesium sulfate.
The residue obtained by evaporation of the solvent
under reduced pressure was purified by column
chromatography (carrier; silica gel, 300 g, developing
solvent; ethyl acetate-hexane=1:5), to give the object
compound.
IR (Neat): 3480, 2975, 1720, 1700, 1650, 1605 cm-i.
IH-NMR (CDCls) 8: 1.20 (3H,t,J=7Hz), 1.53 (l2H,s),
2.64 (2H,d,J=7Hz), 2.67 (lH,brs),3.63 (3H,s), 4.08
(2H,q,J=7Hz), 5.80 (lH,d,J=lSHz), 6.80
(lH,dt,J=l5Hz,7Hz), 7.45 (2H,d,J=8Hz), 7.90
(2H,d,J=8Hz).
The entire amount of ethyl hexenate derivative (22.3 q) was
dissolved in an ethanol-acetic acid mixture (20:1, 200
ml), to which 5~ Pd-C (5.0 g) was added, then was stirred
I34~'l94
-42-
vigorously for 115 hours. After filtration of Pd-C using
celite and evaporation of solvent under reduced pressure,
the residue was subjected to evaporation under reduced
pressure, to give the object compound (15.66 g) as a
colorless oil.
Bp. 162-165°C/0.3mmHg
IR (Neat): 2980, 2940, 1735, 1710, 1607, 848 cm-1.
1H-NrIR (CDClg) s: 1.20 (3H,t,J=7Hz), 1.23
(3H,d,J=6Hz), 1.30-1.80 (4H,m), 1.58 (9H,s), 2.24
(2H,brt,J=6Hz), 2.77 (lH,dq,J=6Hz, 6Hz), 4.08
(2H,q,J=7Hz), 7.20 (2H,d,J=8Hz), 7.90 (2H,d,J=8Hz).
Reference Example 18
Production of ethyl
5-[4-(tert-butoxycarbonyl)phenyl]-2-iodohexanate:
The compound (6.41 g) obtained in the Reference
Example 17 was subjected to the same reaction as that in
the Reference Example 2 to give the object compound (3.90
g)~
IR (Neat): 2980, 2940, 1738, 1715, 1610, 850 cm-1.
1H-NMR (CDCls) d: 1.23 (3H, t,J=7Hz), 1.23
(2H,d,J=7Hz), 1.40-1.95 (4H,m), 1.60 (9H,s), 2.75
(lH,dq,J=6Hz,6Hz), 4.15 (2H,q,J=7Hz), 4.18
(lH,t,J=7Hz), 7.20 (2H,d,J=8Hz), 7.90 (2H,d,J=8Hz).
Reference Example 19
Production of ethyl 5-[4-(tert-butoxycarbonyl)-
phenyl]-2-(dicianomethyl)-hexanoate:
The compound (3.90 g) obtained in the Reference
Example 18 was subjected to the same reaction as that in
the Reference Example 3 to give the object compound (3.19
g)~
IR (Neat): 2980, 2930, 2250, 1735, 1710, 1605, 847
cm-1.
g
_tt3_
1H-NMR (CDCls) 6: 1.26 (1.5H,t,J=7Hz), 1.26
(3H,d,J=7Hz), 1.27 (1.5H,t,J=7Hz), 1.35-1.80 (4H,m),
1.58 (9H,s), 2.50-3.08 (2H,m), 4.00
(lH,dd,J=SHz,4Hz), 4.22 (lH,q,J=7Hz), 4.23
(lH,q,J=7Hz), 7.18 {2H,d,J=8Hz), 7.92 (2H,d,J=8Hz).
Working Example 1
Production of tert-butyl 4-[3-(2,4-diamino-6-hydroxy-
-7H-pyrrolo[2,3-d]pyrimidin-5-yl)propyl]benzoate:
To a solution of potassium tert-butoxide (2.35 g) and
guanidine hydrochloride (1.07 g) in tert-butylalcohol (10
ml) was added a solution of the compound (3.33 g) obtained
in the Reference Example 3 in tert-butyl alcohol (30 ml) '
under an atmosphere of argon, and refluxed by heating for
20 hours. To the reaction mixture were added further
potassium tert-butoxide ( 4a4 mg ) and guanidine hydrochloride
(370 mg) and the mixture was refluxed by heating for further
8 hours. The reaction mixture was cooled, added to 1 N
potassium hydrogen sulfate in water (about 10 ml) and
adjusted to pH 9. After extraction with a
tetrahydrofuran-chloroform mixture, the solvent was -
evaporated off under reduced pressure and the resultant
residue was purified by column chromatography (carrier;
silica gel, 100 g, developing solvent; dichloromethane:
ethanol = 15:1 -~ dichloromethane after mixing with
concentrated aqueous ammonia in a separatory funnel:
ethanol = 15:1), to give the object compound (1.90 g).
IR (KBr): 3430, 3360, 1710, 1627, 1583, 1432 cm-1.
1H-NMR (CDCls-MeaSO-da) d: 1.15-1.73 (2H,m),
1.55 (9H,s), 1.73-2.10 (2H,m), 2.61 (2H,t,J=7Hz),
3.35 (lH,t,J=6Hz), 5.40 (2H,brs), 5.51 (2H,brs),
6.30 (lH,brs), 7.12 (2H,d,J=8Hz), 7.29 (2H,d,J=8Hz).
Working Example 2
Production of tert-butyl 4-[3-(2,4-diamino-7H-pyrrolo
(2,3-d]pyrimidin-5-yl)propyl]benzoate:
~~~o~~~
To a solution of the compound (575 mg) obtained in
the Working Example 1 in tetrahydrofuran (6 ml) was added
a solution of borane-tetrahydrofuran complex (7.5 mmol) in
tetrahydrofuran (7.5 ml) at 0°C, and stirred for 4.5
hours. To the reaction mixture was added acetic acid-.
methanol (1:1, 6 ml) and the mixture was stirred at room temperature
for 15 hours. The solvent was evaporated off under
reduced pressure and the residue was purified by column
chromatography (carrier; silica gel, 30 g, developing
solvent; dichloromethane: ethanol = 100:6 --~ 100:7 ~ 100:8
-~ 10:1 ~ 8:1), to give the object compound (263 mg).
IR (KBr): 3335, 3180, 2975, 2935, 1710, 1607,
1287, 1163, 1110 cm-1.
1H-NMR (MezSO-da) 6: 1.54 (9H,s), 1.77-1.90 (2H,m),
2.68(2H,t,J=8Hz), 2.72 (2H,t,J=8Hz), 5.54 ~(2H,brs),
",
6.11 (2H,brs), 6.45 (lH,s), 7.33 (2H,d,J=8Hz),
7.82 (2H,d,J=8Hz), 10.51 (lH,s).
Working Example 3
Production of diethyl N-[4-[3-(2,4-diamino-7H-
pyrrolo[2,3-d]pyrimidin-5-yl)propyl]benzoyl]-L-glutamate:
To the compound (381 mg) obtained in the Working
Example 2 was added trifluoroacetic acid (3 ml) and the mixture was
stirred at room temperature for 3 hours. Trifluoroacetic
acid was evaporated off under reduced pressure, and to the
residue obtained by drying at 70°C under reduced pressure
and a solution of diethyl L-glutamate hydrochloride (748
mg) in dimethylformamide (4 ml) was added a solution of
diphenylphosphoryl azide (858 mg) in dimethylformamide (4
ml) at 0°C, and then a solution of triethylamine (631 mg)
in dimethylformamide (4 ml) dropwise at the same
temperature. After stirring at 0°C for 30 minutes and
then at room temperature for 63 hours, the precipitate was
filtered off. The solvent was evaporated off under
reduced pressure and the resultant residue was purified by
column chromatography (carrier; silica gel, 20 g,
-45-
developing solvent; dichloromethane after mixing with
concentrated aqueous ammonia in a separatory funnel -
dichloromethane after mixing with concentrated aqueous
ammonia: ethanol = 40:1 -~ 30:1), to give the object
compound (260 mg).
IR (KBr): 3330, 3160, 1735, 1632, 1575, 1540, 1500,
1200 cm-1.
1H-NMR (MezSO-da) a: 1.17(3H,t,J=7Hz), 1.20
(3H,t,J=7Hz), 1.80-2.20 (4H,m), 2.44 (2H,t,J=7Hz),
2.68 (2H,t,J=7Hz), 2.72 (2H,t,J=7Hz), 4.05
(2H,q,J=7Hz), 4.11 (2H,q,J=7Hz), 4.35-4.50 (lH,m),
5.34 (2H,s), 5.91 (2H,s), 6.42 (lH,s), 7.31
(2H,d,J=8Hz), 7.80 (2H,d,J=8Hz), 8.66 (lH,d,J=8Hz),
10.51 (lH,s).
Working Example 4
Production of N-[4-[3-{2,4-diamino-7H-pyrrolo
[2,3-d]pyrimidin-5-yl)propyl]benzoyl]-L-glutamic acid:
The compound (250 mg) obtained in the Working Example
3 was dissolved in tetrahydrofuran-water mixture (1:1, 7
ml), to which 1 N sodium hydroxide in water (2.52 ml) was
added and the mixture was stirred at room temperature for 1.5 hours. The
solution was concentrated to 3 ml under reduced pressure,
and the resultant insoluble matter was filtrated off
through a millipore filter. To the filtrate, cooled to 0°C,
was added acetic acid (0.5 ml) and the resultant crystals
were collected by filtration and washed throughly with ice
water. The crystals were dried at 70°C under reduced
pressure, to give the object compound (201 mg) as white
crystals.
IR (KBr): 3340, 3200, 2940, 1660-1630, 1540,
1500, 1397 cm-1.
1H-NMR (Me2S0-da) b: 1.75-2.20 (4H,m), 2.35
(2H,t,J=7Hz), 2.68 (2H,t,J=7Hz), 2.71 (2H,t,J=7Hz),
4.30-4.47 (lH,m), 5.53 {2H,brs), 6.15 (2H,s),
6.46 (lH,s), 7.31 (2H,d,J=8Hz), 7.81 (2H,d,J=8Hz),
I340'~94
-46-
8.48 (lH,d,J=8Hz), 10.51 (lH,s).
Working Example 5
Production of diethyl N-[4-[3-(2,4-diamino-
6-hydroxy-7H-pyrrolo[2,3-d]pyrimidin-5-yl)
propyl]benzoyl]-L-glutamate:
The compound (200 mg) obtained in the Working Example
1 was subjected to the same reaction as that in the
Working Example 3, to give the object compound (164 mg).
IR (KBr): 3355, 3230, 2995, 2990, 1740, 1638,
1595, 1590 cm-1.
1H-NMR (CDCls/MeaSO-ds) d: 1.20 (3H,t,J=7Hz),
1.25 (3H,t,J=7Hz), 1.25-2.70 (llH,m), 3.25-3.45
(lH,m), 4.05 (2H,q,J=7Hz), 4.15 (2H,q,J=7Hz),
4.38-4.68 (lH,m), 5.63 (2H,brs), 5.66 (2H,brs),
7.16 (2H,d,J=8Hz), 7.76 (2H,d,J=8Hz),
8.39 (lH,d,J=SHz), 10.50 (lH,s).
Working Example 6
Production of N-[4-[3-(2,4-diamino-6-hydroxy
7H-pyrrolo[2,3-d]pyrimidin-5-yl)propyl]benzoyl]-L
glutamic acid:
The compound (112 mg) obtained in the Working Example
5 was subjected to the same reaction as that in the
Working Example 4, to give the object compound (60 mg).
IR (KBr): 3350, 3210, 2950, 1730, 1660,
1630 cm-1.
1H-NMR (Me2S0-ds) s: 1.20-1.56 (2H,m),
1.65-2.20(4H,m), 2.35 (2H,t,J=7Hz), 2.50-2.65
(2H,m), 3.25-3.35 (lH,m), 4.32-4.46 (lH,m),
5.90 (2H,brs), 6.00 (2H,brs). 7.22 (2H,d,J=8Hz),
7.78 (2H,d,J=8Hz), 8.52 (lH,d,J=8Hz), 10.45
(lH,s).
Working Example 7
Production of diethyl N-[4-[3-(2-amino-4-
hydroxy-7H-pyrrolo[2,3-d]pyrimidin-5-yl)propyl]
benzoyl]-L-glutamate:
' 1340~~~
-47-
The compound (150 mg) obtained in the Reference
Example 7 was dissolved in ethanol (22.5 ml), to which
were added 10~ Pd-C (450 mg: manufactured by Engelhand Co.
Ltd.) and 2 drops of acetic acid and stirred vigorously at
room temperature for 62.5 hours. The catalyst was
filtered off, the filtrate was concentrated to dryness
and the residue was purified by column chromatography
(carrier; silica gel, 10 g, developing solvent; chloroform
containing 5~ ethanol), to give the object compound (33
mg).
IR (KBr): 3340, 2940, 1740, 1680, 1670, 1630,
1540, 1440, 1380, 1340, 1210, 1100, 1020,
860 cm-1.
1H-NMR {CDCls/CDsOD) b: 1.20 (3H,t,J=6Hz), 1.28
(3H,t,J=6Hz), 1.87-2.36 (4H,m), 2.40-2.57,~2H,m),
2.60-2.87 (4H,m), 3.96-4.37 (4H,q x 2,J=6Hz),
4.56-4.90 {lH,m), 6.37 (lH,s), 7.23 (2H,d,J=7.5Hz),
7.71 (2H,d,J=7.5Hz).
Working Example 8
Production of N-[4-[3-(2-amino-4-hydroxy-7H-
pyrrolo[2,3-d]pyrimidin-5-yl)propyl]benzoyl]-L-glutamic
acid:
The compound (27 mg) obtained in the Working Example
7 was dissolved in a tetrahydrofuran-water mixture (1:1,
2.16 ml), to which was added 1 N sodium hydroxide in water
(0.189 ml) and stirred at room temperature for 2.5 hours.
A large portion of tetrahydrofuran was evaporated off,
acetic acid {0.189 ml) was added by ice-cooling and
stirred. The resulting precipitate was collected by
filtration and dried, to give the object compound (19 mg).
IR (KBr): 3400, 3300, 2950, 1700, 1650, 1540,
1510, 1400, 1340, 1240, 1080, 1020 cm-1
1H-NMR (Me2S0-do) d: 1.80-2.17 (4H,m), 2.23-2.40
(2H,m), 2.53-2.83 {4H,m), 4.27-4,56 (lH,m),
6.33 (lH,s), 7.27 (2H,d,J=7.5Hz), 7.78
1340"~0~
(2H,d,J=7.5Hz).
Working Example 9
Production of tert-butyl 4-[3-(2,4-diamino-6-oxo-5,6-
dihydropyrrolo[2,3-d]pyrimidin-5-yl)propyl]benzoate:
To a solution of potassium tert-butoxide (2.35 g) and
guanidine hyrochloride (1.07 g) in tert-butyl alcohol (10
ml) was added a solution of the compound (3.33 g) obtained
in the Reference Example 16 in tert-butyl alcohol (30 ml)
under an atmosphere of argon, and refluxed by heating for
hours. To the reaction mixture were added further
potassium tert-butoxide (434 mg) and guanidine
hydrochloride (370 mg), and refluxed by heating for
further 8 hours. The reaction mixture was cooled, added
15 to 1 N potassium hydrogen sulfate in water (about 10 ml),
to be adjusted to pH 9. After extraction with a
tetrahydrofuran-chloroform mixture, the solvent was
evaporated off under reduced pressure, and the resultant
residue was purified by column chromatography (carrier;
20 silica gel, 100 g, dichloromethane-ethanol, 15:1
dichloromethane after mixing with concentrated aqueous
ammonia in a separatory funnel-ethanol, 15:1), to give the
object compound (1.90 g).
IR (KBr): 3430, 3360, 1710, 1627, 1583, 1432cm-1.
1H-NMR (CDCls/Me2S0-ds) s: 1.15-1.73 (2H,m), 1.55
(9H,s), 1.73-2.10 (2H,m), 2.61 (2H,t,J=7Hz), 3.35
(lH,t,J=6Hz), 5.40 (2H,brs), 5.51 (2H,brs), 6.30
(lH,brs), 7.12 (2H,d,J=8Hz), 7.29(2H,d,J=8Hz).
Working Example 10
Production of tert-butyl 4-[3-(2,4-diamino-5,6-
dihydropyrrolo[2,3-d]pyrimidin-5-yl)propyl]benzoate:
To a solution of the compound (430 mg) obtained in
the Working Example 9 in tetrahydrofuran (10 ml) was added
a solution of borane-tetrahydrofuran complex (16.8 mmol)
- 49 -
in tetrahydrofuran (10 ml) and the mixture was refluxed by heating
for 4 hours. After cooling, the reaction mixture was added to ice
water and stirred vigorously at pH 2 (adjusted by addition of 1N
hydrochloric acid) for 3 minutes and then at pH 10.5 (adjusted by
addition of 2 N potassium carbonate in water) for 5 minutes. The
reaction mixture was extracted with tetrahydrofuran-chloroform
mixture. The solvent was evaporated off under reduced pressure,
and the residue was purified by column chromatography (carrier;
silica gel, 20 g, dichloromethane-ethanol, 30:115:1 dichloro-
methane after mixing with concentrated aqueous ammonia in a
separatory funnel-ethanol, 20:1), to give the object compound
(114 mg).
IR (KBr): 3375, 3325, 3190, 2970, 2930, 1712, 1603cm 1.
1H-rdMR (CDC13/Me2S0-d6) 8: 1.45-2.15 (4H,m), 1.57 (9H,s),
2.65 (2H,t,J=7Hz), 3.00-3.28 (2H,m), 3.44-3.70 (lH,m), 4.85
(2H,brs), 4.90 (2H,brs), 5.30 (lH,brs), 7.19 (2H,d,J=8Hz), 7.80
(2H,d,J=8Hz).
Working Example 11
Production of diethyl N-[4-[3-(2-amino-4-hydroxy-5,6-di-
hydropyrrolo[2,3-d]pyrimidin-5-yl)propyl]benzoyl]-L-glutamate:
The compound (1.47 g) obtained in the Reference Example
10 was suspended in tetrahydrofuran (60 ml), to which 0.1 N sodium
hydroxide in water (120 ml) was added, and the mixture was stirred
at room temperature for 21 hours. Then the solution was neutralized
with 0.1 N hydrochloric acid (60 ml) and concentrated to dryness
under reduced pressure. The residue was suspended in dried
~.340'~~4
- 49a -
dimethylformamide (112.5 m1), to which diethyl L-glutamate
hydrochloride (2.88 g), diphenylphosphoryl azide (1.295 ml) and
triethylamine (2.52 ml) were added. The mixture was brought back
to the room temperature, and stirring was continued for 63 hours.
The resulting precipitate was filtered off, and the
13~:Or~9~
-50-
filtrate was concentrated to dryness under reduced
pressure. The residue was subjected to
separation-purification with column chromatography on
silica gel (carrier; 100 g) (ethanol containing 6.9~
ammonia-chloroform containing 6.9~ ammonia, 1:20-1:10), to
give the object compound (1.12 g) as a colorless powder.
IR (KBr): 3330, 2930, 1740, 1670, 1640, 1570, 1540,
1440, 1375, 1300, 1200, 1095, 1020 cm-1.
iH-NMR (CDCls/CDsOD)6: 1.20 (3H,t,J=7.5Hz), 1.27
(3H,t,J=7.5Hz), 1.47-1.83 (4H,m), 2.00-2.36 (2H,m),
2.37-2.50 (2H,m), 2.67 (2H,t,J=7.5Hz), 3.10-3.37
(2H,m), 3.53-3.80 (lH,m), 3.96-4.33 (4H,qx2,J=7.5Hz),
4.60-4.87 (lH,m), 7.25 (2H,d,J=9Hz), 7.75
(2H,d,J=9Hz).
Working Example 12
Production of diethyl N-[4-[2-(2-amino-4-hydroxy-
5,6-dihydropyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzoyl]-
L-glutamate:
The compound (0.315 g) obtained in the Reference
Example 13 was subjected to the same reaction as that in
the Working Example 11, to give the object compound (0.247
g)~
IR (KBr): 3310, 2990, 1740, 1730, 1690, 1640, 1570,
1530, 1440, 1375, 1330, 1300, 1240, 1200, 1090,
1010, 850cm-1.
iH-NMR (CDCls/CDsOD)6: 1.22 (3H,t,J=7.5Hz), 1.30
(3H,t,J=7.5Hz), 1.53-2.87 (8H,m), 3.13-3.90 (3H,m),
4.00-4.43 (4H,qx2,J=7.5Hz), 4.57-4.90 (lH,m), 7.25
(2H,d,J=9Hz), 7.72 (2H,d,J=9Hz).
Working Example 13
Production of diethyl N-(4-[3-(2,4-diamino-5,6-
dihydropyrrolo[2,3-d]pyrimidin-5-yl)propyl]benzoyl]-
L-glutamate:
The compound (94 mg) obtained in the Working Example
10 was dissolved in 1 ml of trifluoroacetic acid and
~~~o~~~
-51-
stirred at room temperature for 3 hours. The solvent was
evaporated off under reduced pressure, and to the mixture
of the residue obtained by drying at 70°C
under reduced pressure and diethyl L-glutamate (304 mg) in
dimethylformamide (2 ml), was added a solution of
diphenylphosphoryl azide (350 mg) in dimethylformamide
(1.5 ml) at 0°C, and then a solution of triethylamine (180
mg) in dimethylformamide (1.5 ml) dropwise at the same
temperature. After stirring at 0°C for 30 minutes and
then at room temperature for 78 hours, the solvent was
evaporated off under reduced pressure. The resultant
residue was purified by column chromatography (carrier;
silica gel, 20 g, dichloromethane after mixing with
concentrated aqueous ammonia in a separatory
funnel~dichloromethane after mixing with concentrated
aqueous ammonia -ethanol 40:1--~30:1), to give the object
compound (88 mg).
IR (KBr): 3350, 2990, 2945, 1740, 1610, 1540, 1508,
1438cm-l.
1H-NMR (CDCls) s: 1.23 (H,q,J=7Hz), 1.43-1.80 (3H,m),
1.85-2.77 (7H,m), 2.95-3.30 (2H,m), 3.58
(lH,t,J=llHz), 4.07 (2H,q,J=7Hz), 4.20 (2H,q,J=7Hz),
4.25 (lH,brs), 4.63-4.83 (lH,m), 4.68 (lH,brs),
7.00-7.23 (IH,m), 7.13 (2H,d,J=8Hz), 7.67
(2H,d,J=8Hz).
Working Example 14
Production of N-[4-[3-(2-amino-4-hydroxy-5,6-
dihydropyrrolo[2,3-d]pyrimidin-5-yl)propyl]benzoyl]-
L-glutamic acid:
The compound (1.05 g) obtained in the Working Example
11 was dissolved in tetrahydrofuran-water mixture (2:1, 63
ml), to which 1 N sodium hydroxide in water (7.35 ml) was
added, and stirred at room temperature for 2.5 hours.
Tetrahydrofuran was evaporated off, a small amount of
insoluble matter was filtered off , acetic acid, (7.35 ml)
13~0°~~~
-52-
was added to the filtrate, and the resulting precipitate
was collected by filtration. The precipitate was washed
with water and dried, to give the object compound (0.85 g)
as a colorless powder.
IR (KBr): 3340, 2930, 1690, 1630, 1540, 1440, 1300,
1080, 850cm-1.
1H-NMR (DMSO-ds) 8: 1.20-1.80 (4H,m)-, 1.87-2.17
(2H,m), 2.23-2.40 (2H,m), 2.50-2.77 (2H,m),
2.83-3.20 (2H,m), 3.30-3.63 (lH,m), 4.23-4.53
(lH,m), 7.26 (2H,d,J=9Hz), 7.77 (2H,d,J=9Hz).
Working Example 15
Production of N-[4-[2-(2-amino-4-hydroxy-5,6-
dihydropyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzoyl]-L-
glutamic acid:
The compound (0.195 g) obtained in the Working
Example 12 was subjected to the same reaction as that in
the Working Example 14, to give the object compound (0.153
g)~
IR (KBr): 3250, 2900, 1650, 1580, 1440, 1300,
1090cm-1.
1H-NMR (DMSO-de) s: 1.43-1.76 (lH,m), 1.98
(2H,t,J=7.5Hz), 1.80-2.10 (lH,m), 2.13-2.40
(2H,m), 2.67 (2H,t,J=9Hz), 2.90-3.23 (2H,m),
3.33-3.60 (lH,m), 4.10-4.43 (lH,m), 7.28
(2H,d,J=9Hz), 7.75 (2H,d,J=9Hz).
Working Example 16
Production of N-[4-[3-(2,4-diamino-5,6-
dihydropyrrolo[2,3-d]pyrimidin-5-yl)propyl]benzoyl]-
L-glutamic acid:
The compound (41 mg) obtained in the Working Example
l3 was subjected to the same reaction as that in the
Working Example 14, to give the object compound (32 mg).
IR (KBr): 3700-2350, 3215, 1690-1620, 1540cm-1.
1H-NMR (MeaSO-ds) 6: 1.02-1.85 (4H,m), 1.85-2.83
(6H,m), 2.90-3.30 (2H,m), 3.55 (lH,t,J=llHz),
.:
-53-
4.15-4.45 (lH,m), 6.38 (2H,brs), 6.77 (2H,brs),
6.90 (lH,brs), 7.22 (2H,d,J=8Hz), 7.74
(2H,d,J=8Hz), 8.22 (lH,d,J=7Hz).
Working Example 17
Production of tert-butyl 4-[3-(2,4-diamino-6-hydroxy-
7H-pyrrolo[2,3-d]pyrimidin-5-yl)-1-methylpropyl]benzoate:
The compound (3.18 g) obtained in the Reference
Example 19 was subjected to the same reaction as that in
the Working Example 1, to give the object compound (2.61
g)~
IR (KBr): 3360, 3235, 2975, 2700, 1715, 1625, 1584,
1438, 1290, 1163, 1118, 848 cm-1.
1H-NMR (MeaSO-da) b: 1.14 (3H,d,J=7Hz), 1.20-1.50
(2H,m), 1.54 (9H,s), 1.55-1.80 (lH,m), 1.80-2.05
(lH,m), 2.60-2.78 (lH,m), 3.20-3.30 (lH,m), 5.86
(2H,brs), 5,96 (2H,brs), 7.25 (ZH,d,J=8Hz), 7.81
(2H,d,J=8Hz), 10.42 (lH,s).
Working Example 18
Production of tert-butyl 4-[3-(2,4-diamino-6,7-
dihydro-5H-pyrrolo[2,3-d]pyrimidin-5-yl)-1-methylpropyl]-
benzoate (A) and tert-butyl-4-[3-(2,4-diamino-7H-pyrrolo-
[2,3-d]pyrimidin-5-yl)-1-methyl-propyl]benzoate (B):
To a suspension of the compound (2.00 g) obtained in
the Working Example 17 in tetrahydrofuran (25 ml) was a
solution of bolane-tetrahydrofuran complex (40.3 mmol) in
tetrahydrofuran (40.3 ml). After stirring for 10 minutes,
the mixture was cooled to room temperature and further
stirred for 5 hours. To the reaction mixture was added an
acetic acid~nethanol mixture (1:1, 40 ml) and the mixture was stirred for
18 hours at room temperature. After evaporation of
solvent under reduced pressure, the resulting residue was
purified by column chromatography (carrier: silica gel,
100 g, developing solvent;
54
dichloromethane-ethanol=20:1-~25:2, then
dichloromethane-ethanol containing ammonia {6~)), to give
the object compound (A) (579 mg) and (B) (1.214 g).
(A) IR (KBr): 3350, 3200, 2980, 2940m, 1714, 1650, 1608,
1290, 1163, 1115, 848 cm-1.
1H-NMR (CDCls) 6: 1.31 (3H,d,J=7Hz), 1.60 (9H,s),
1.94 (2H,dt,J=8Hz,8Hz), 2.40-2.60 (2H,m), 2.85
(lH,tq,J=7Hz,7Hz), 4.50-5.50 (4H,br), 6.46 (lH,s),
7.27 (2H,d,J=8Hz), 7.96 (2H,d,J=8Hz), 9.20 (lH,brs).
(B) IR (KBr): 3340, 3195, 2980, 2935, 1715, 1607, 1430,
1295, 1163, 1115, 847 cm-1.
1H-NMR (Me2S0-ds) s: 1.18 (2.25H,d,J=7Hz), 1.19
(0.75H,d,J=7Hz), 1.23-1.42 (2H,m), 1.45-1.65 (2H,m),
1.54 (9H,s), 2.64-2.70 (lH,m), 2.90-3.08 (2H,m),
3.30-3.50 (lH,m), 5.43 (4H,s), 5.95 (0.25H,s), 6.00
(0.75H,s), 7.32 (2H,d,J=8Hz), 7.82 (2H,d,J=8Hz).
Working Example 19
Production of diethyl N-[4-[3-(2,4-diamino-6,7-
dihydro-5H-pyrrolo[2,3-d]pyrimidin-5-yl)-1-methylpropyl]-
benzoyl]-L-glutamate
The compound (A) (581 mg) obtained in the Working
Example 18 was subjected to the same reaction as that in
the Working Example 3 to give the object compound {640
mg)~
IR (KBr): 3375, 3200, 2975, 2930, 1738, 1608, 1430,
1200, 1008, 853 cm-1.
1H-NMR (Me2S0-de) b: 1.17 (3H,t,J=7Hz), 1.18
(3H,d,J=7Hz), 1.19 (3H,t,J=7Hz), 1.26-1.44 (2H,m),
1.44-1.63 (2H,m), 1.90-2.20 (2H,m), 2.44
(2H,t,J=7Hz), 2.63-2.80 (lH,m), 2.90-3.08 (2H,m),
3.30-3.50 (lH,m), 4.05 {2H,q,J=7Hz), 4.11
(2H,q,J=7Hz), 4.37-4.50 (lH,m), 5.36 (2H, s), 5.37
(2H,s), 5.87 (0.25H,s), 5.91 (0.75H,s), 7.30
(2H,d,J=8Hz), 7.80 (2H,d,J=8Hz), 8.66 (lH,d,J=8Hz).
~3447~4-
-55-
Working Example 20
Production of N-[4-[3-(2,4-diamino-6,7-dihydro-5H-
pyrrolo[2,3-d]pyrimidin-5-yl)-1-methylpropyl]benzoyl]-
L-glutamic acid:
The compound (600 mg) obtained in the Working Example
19 was subjected to the same reaction as that in the
Working Example 4, to give the object compound (508 mg).
IR (KBr): 3350, 3200, 1690, 1680-1610, 1635, 1530,
1400, 1300, 853 cm-1.
1H-NMR (MeaSO-da) a: 1.20 (3H,d,J=7Hz), 1.25-1.65
(4H,m), 1.87-2.20 (2H,m), 2.30 (2H,t,J=7Hz),
2.60-2.80 (lH,m), 3.00-3.20 (2H,m), 3.42-3.60 (lH,m),
4.22-4.40 (lH,m), 6.20-5.08 (SH,m), 7.28
(2H,d,J=8Hz), 7.78 (2H,d,J=8Hz), 8.28-8.36 (lH,m).
Working Example 21
Production of diethyl N-[4-[3-(2,4-diamino-7H-
pyrrolo[2,3-d]pyrimidin-5-yl)-1-methylpropyl]benzoyl]-
L-glutamic acid:
The compound (B) (540 mg) obtained in the Working
Example 18 was subjected to the same reaction as that in
the Working Example 3, to give the object compound (556
mg).
IR (KBr): 3340, 3180, 2935, 1735, 1640, 1610, 1580,
1200, 1095, 1018, 850 cm-1:
1H-NMR (CDCls) b: 1.23 (3H,t,J=7Hz), 1.30
(3H,d,J=7Hz), 1.31 (3H,t,J=7Hz), 1.80-2.05 (4H,m),
2.15-2.57 (4H,m), 2.83 (lH,tq,J=7Hz,7Hz), 4.12
(2H,q,J=7Hz), 4.25 (2H,q,J=7Hz), 4.68 (2H,brs),
4.75-4.87 (lH,m), 4.92 (2H,brs), 6.43 (lH,s), 7.26
(2H,d,J=8Hz), 7.37 (lH,dd,J=7Hz,3Hz), 7.77
(2H,d,J=8Hz), 8.81 (lH,brs).
Working Example 22
~34o~u~
-56-
Production of N-[4-[3-(2,4-diamino-7H-pyrrolo[2,3-d]-
pyrimidin-5-yl)-1-methylpropylJbenzoyl]-L-glutamic acid:
The compound (533 mg) obtained in the Working Example
21 was subjected to the same reaction as that in the
Working Example 4, to give the object compound (436 mg).
IR (KBr): 3350, 3205, 1650, 1640, 1540, 1400, 850
cm-1.
1H-NMR (MeaSO-de) a: 1.25 (3H,d,J=7Hz), 1.73-2.20
(4H,m), 2.35 (3H,t,J=8Hz), 2.40-2.68 (2H,m), 2.85
(lH,tq,J=7Hz,7Hz), 4.32-4.45 (lH,m), 5.54 (2H,brs),
6.06 (2H,brs), 6.38 (lH,s), 7.33 (2H,d,J=8Hz), 7.83
(2H,d,J=8Hz), 8.49 (lH,d,J=8Hz), 10.45 (lH,s).
Working Example 23
The compound (50 mg per tablet) obtained in the
Working Example 14, lactose (250 mg per tablet), corn
starch (51 mg per tablet) and hydroxypropylcellulose L (9
mg per tablet) were mixed according to the conventional
method and granulated. The granules, corn starch (8 mg
per tablet) and magnesium stearate (2 mg per tablet) were
mixed and tabletted according to the conventional method,
to give tablets (370 mg per tablet).
Working Example 24
Ten grams of the sodium salt of the compound obtained
in the Working Example 14 was dissolved in 1.2 of
physiological saline. The solution was filtered through
a microfilter and dispensed in 2.2 ml aliquots in
ampoules, sterilized at 110°C for 30 minutes and the
ampoules may be used for subcutaneous, intravenous or
intramuscular injections.
Working Example 25
Five grams of the hydrochloride of the compound
obtained in the Working Example 14 and 10 g of mannitol
_5~_ ~.340~~04
were dissolved in 1.2 of distilled water, and the solution
was dispensed in 2 m,2 aliquots into ampules after
filtration through a bacterial filter. The ampoules were
dried in a freeze-drier and sealed, and thus the ampoules
of which content is dissolved before use were obtained.
Before use for injection, the ampoules are opened and the
content is dissolved in, for example, 2 m,2 of
physiological saline.
15
25
35
